Toshiba Power Supply RS485 User Manual

E6581315②

TOSVERT VF-AS1 Series

RS485 Communication Function

Instruction Manual

Notice

1. Make sure that this instruction manual is delivered to the end user of the inverter.

2. Read this manual before first using the communications function, and keep it handy as a

reference for maintenance and inspections.

* The contents of this manual are subject to change without notice.

E6581315

Contents

General outlines of the communication function......................................................................................................... 3

Data transmission specifications................................................................................................................................ 4

Communication protocol............................................................................................................................................. 5

3.1. About the handling of received frames............................................................................................................... 5

TOSHIBA Inverter Protocol......................................................................................................................................... 6

4.1. Data transmission format ................................................................................................................................... 7

4.1.1.Data transmission format used in ASCII mode......................................................................................... 7

4.1.2.Data transmission format used in binary mode ...................................................................................... 10

4.1.3.Transmission format of Block Communication ....................................................................................... 13

4.2. Commands....................................................................................................................................................... 17

4.3. Transmission errors ......................................................................................................................................... 20

4.4. Broadcast communication function.................................................................................................................. 21

4.5. Examples of the use of communication commands......................................................................................... 23

4.6. Examples of Communication programs ........................................................................................................... 24

MODBUS-RTU protocol............................................................................................................................................ 29

5.1. MODBUS-RTU transmission format .............................................................................................................. 30

5.1.1.Read command (03)............................................................................................................................... 30

5.1.2.Write command (06)............................................................................................................................... 31

5.2. CRC Generation............................................................................................................................................... 32

5.3. Error codes....................................................................................................................................................... 32

Inter-drive communication ........................................................................................................................................ 33

6.1. Proportional control of speed ........................................................................................................................... 37

6.2. Transmission format for inter-drive communication ......................................................................................... 39

Communication parameters ..................................................................................................................................... 40

7.1. Baud rate(, ) , Parity ()................................................................................................ 42

7.2. Inverter number()................................................................................................................................. 42

7.3. Communication time-out time (), Communication time-out action (f804 ............................................................... 43

)

7.4. Send waiting time (, ) .............................................................................................................. 44

7.5. Free notes()......................................................................................................................................... 44

Commands and monitoring from the computer ........................................................................................................ 45

8.1. Communication commands (commands from the computer) .......................................................................... 45

8.2. Monitoring from the computer .......................................................................................................................... 49

8.3. Utilizing panel (LEDs and keys) by communication ......................................................................................... 58

8.3.1.LED setting by communication............................................................................................................... 58

8.3.2.Key utilization by communication ........................................................................................................... 61

Parameter data......................................................................................................................................................... 62

Appendix 1 Table of data codes........................................................................................................................................ 67

Appendix 2 Response time............................................................................................................................................... 68

Appendix 3 Compatibility with the communication function of the VF-A7 ......................................................................... 69

Appendix 4 Troubleshooting ............................................................................................................................................. 70

Appendix 5 Connecting for RS485 communication........................................................................................................... 71

E6581315

1. General outlines of the communication function

This manual explains the RS485 communication function provided for the TOSVERT VF-AS1 series

of industrial inverters.

(1) RS485 communication by the use of a two-wire RS485 communication port (standard function)

(2) RS485 communication by the use of a four-wire RS485 communication port (standard function)

(1) 2-wire RS485 communication

connector

(2) 4wire RS485 communication

connector

By using these communication functions in combination with the computer link function designed to

establish a link between a higher level computing machine or controller (hereinafter referred to as a

computer) and each inverter on the network, or with the inter-drive communication function that al-

lows proportional control of inverters without using a computer, you can set up a network for data

communication between inverters.

There are two communication protocols available: Toshiba Inverter Protocol and MODBUS-RTU

Protocol (this command does not support all commands). To select a protocol, the communication

protocol selection parameter f807or f829is used. (Refer to Section 3. Communication proto-

col.)

By preparing the program (explained later), the following information can be exchanged between the

computer (host) and the inverter.

(1) Monitoring function (used to monitor the operating status of the inverter: Output frequency,

current, voltage, etc.)

(2) Command function (used to issue run, stop and other commands to the inverter)

(3) Parameter function (used to set parameters and read their settings)

<Inter-drive communication function>

Master inverter sends the data, that is selected by the parameter, to all the slave inverters on the

same network. This function allows a network construction in which a simple synchronous or

proportional operation is possible among plural inverters (without the host computer).

As for data communication codes, the TOSVERT VF-AS1 series of inverters support the binary

(HEX) code, in addition to the JIS (ASCII) code. A communication number is used to access the de-

sired data item.

* The smallest unit of information that computers handle is called a “bit (binary digit),” which repre-

sents the two numbers in the binary system: 1 or 0. A group of 16 bits is referred to as a “word,”

which is the basic unit of information the VF-AS1 series of inverters use for data communication.

One word can handle data items of 0 to FFFFH in hexadecimal notation (or 0 to 65535 in decimal

notation).

BIT15

BIT8BIT7

BIT0

1 bit

1 word

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2. Data transmission specifications

Items

Specifications

Transmission scheme

Half-duplex

*: Standard

default setting

Synchronization scheme

Communication baud rate 9600/19200*/38400 bps (selectable using a parameter) ^*1

Start-stop synchronization

Communication protocol

Character transmission

TOSHIBA Inverter Protocol * / MODBUS-RTU (selectable using a parameter) ^*1

<ASCII mode> JIS X 0201 8-bit (ASCII)

<Binary mode, MODBUS-RTU> Binary codes fixed to 8 bits

Received by inverter: 1 bit, Sent by inverter: 2 bits ^*3

Parity ^*2: Even */Odd/Non parity (selectable using a parameter) ^*1

checksum(Toshiba inverter protocol), CRC(MODBUS-RTU)

Stop bit length

Error detecting scheme

Character

transmission 11-bit characters ^*1(Stop bit=1, with parity)

format

Order of bit transmission

Frame length

Low-order bits transmitted first

Variable (to a maximum of 17 bytes)

*1: Changes to setting do not take effect until the inverter is turned back on or reset.

*2: JIS-X-0201 (ANSI)-compliant 8-bit codes are used for all messages transmitted in ASCII mode

and vertical (even) parity bits specified by JIS-X-5001 are added to them. These even parity bits

can be changed to odd parity bits by changing the parameter setting (a change to the parameter

setting does not take effect until the inverter has been reset.)

*3: Here are the default character transmission format.

Characters received: 11 bits (1 start bit + 8 bits + 1 parity bit + 1 stop bit)

START

BIT

PARITY STOP

BIT BIT

BIT0

BIT1

BIT2

BIT3

BIT4

BIT5

BIT6

BIT7

The inverter receives one stop bit.

(The computer can be set so as to send 1, 1.5 or 2 stop bits.)

Characters sent: 12 bits (1 start bit + 8 bits + 1 parity bit + 2 stop bits)

START

PARITY STOP

BIT BIT

STOP

BIT

The inverter sends two stop bits.

(The computer can be set so as to receive 1, 1.5 or 2 stop bits.)

BIT0

BIT1

BIT2 BIT3

BIT4

BIT5

BIT6

BIT7

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3. Communication protocol

This communication protocol supports the TOSHIBA Inverter Protocol and part of MODBUS-RTU

protocol.

Select the desired protocol from in the following communication protocol selection parameters

(, ).

“Parameter Name  and , Communication Number. 0807 and 0829”

Data Range: 0, 1 (Initial value: 0)

0: TOSHIBA (Includes inter-drive communication)

1: MOUBUS-RTU

* A parameter change is reflected when the inverter is reset, such as in power off.

3.1. About the handling of received frames

To send and receive data frames, a frame synchronization system for locating the start and end

points of each frame is defined with time for which no data is sent (time interval equivalent to the

time required to send 3.5 bytes of data).

If no data is sent for the time required to send 3.5 bytes of data at the current transmission speed

(approx. 4 ms or more at 9,600 bps or approx. 2 ms or more at 19,200/38,400 bps) after receipt of a

frame, the entire frame is assumed to have reached and information in it is analyzed. For this rea-

son, an interval corresponding to at least 3.5 bytes of data must be placed between frames.

When sending a significant data set using two or more frames, an interval corresponding to at least

1.5 bytes of data must be placed between frames. If an interval corresponding to 1.5 bytes or more

is not placed, the contents of a frame are analyzed separately from those of the other frames, and

therefore communication are not carried out normally.

When two or more inverters on the same line are controlled individually one after another, not only

data from the host computer to an inverter but also a response from an inverter to the host computer

are transmitted to the other inverters on the line too. Therefore, an interval corresponding to at least

3.5 bytes should be placed between the time when the host computer receives a response from an

inverter and the time when it sends a frame to the next inverter. Otherwise the return frame received

and the frame that is sent immediately after receipt of the return frame will be recognized as one

frame and communication will not be carried out normally.

[Correct]

Frame B

Frame A

Note: An inverter cannot receive frame

3.5 bytes or more

B before it finishes analyzing the

contents of frame A.

[Wrong] If divided into two smaller frames, frame A cannot be received as a

single frame.

Frame B

Frame A (1/2)

Frame A (2/2)

1.5 bytes or more

Note: Correct if the interval corresponds

to less than 1.5 bytes of data.

E6581315

4. TOSHIBA Inverter Protocol

Select “TOSHIBA” (, =) in the communication protocol selection parameters.

“TOSHIBA” (, =) is set for initial communication protocol selection of shipment

setting. (See “3. Communication protocol.”)

„ Exchange of data between the computer and the inverter

In communication between the computer and the VF-AS1 (hereinafter referred to as the inverter),

the inverter is always placed in wait states and acts as a slave that operates on a request from the

computer.

A discrimination between ASCII mode and binary mode is automatically made with the start code.

Start code

“(”

“CR” (carriage return)

Required

ASCII mode

Binary mode

“2FH(/) ”

Not required

(1) If there is no transmission format or the inverter number that matches, an error occurs and no

response is returned.

(2) When an inverter number is added behind the “(” communication will take place only in case of

broadcast communication or if the number matches up with that assigned to the inverters.

(3) When a time-out period is specified with parameter f803(communication time-out time), a

time-out occurs if communication do not terminate normally within the specified time. With

parameter f804(communication time-out action), you can specify what the inverter should do

if a time-out occurs. For details, refer to Section 7.3.

(4) On executing the command received, the inverter returns data to the computer. For the response

time, see Appendix 2, “Response time.”

„ Note

Communication is not possible for about two seconds after the power is supplied to the inverter until

the initial setting is completed. If the control power is shut down due to an instantaneous voltage

drop, communication is temporarily interrupted.

E6581315

4.1. Data transmission format

„ Note: The term “trip status” used in this manual includes retry waiting status and trip retention status.

4.1.1. Data transmission format used in ASCII mode

A communication number is used to specify a data item, all data is written in hexadecimal, and JIS-

X-0201 (ASCII (ANSI))-compliant transmission characters are used.

„ Computer → Inverter

　Omissible in one-to-one communication

For the W and P commands only　　 Omissible

(3.5bytes

Blank) (28H) 2 bytes

"("

INV-NO

CMD Communication No.

1 byte 4 bytes

DATA

"&"

SUM

")"

CR 　(3.5bytes

0 to 4 bytes (26H) 2 bytes (29H) (0DH)

Blank)

　　　　Checksum area 　　　

　　 Omissible

1. “(“ (1 byte)

: Start code in ASCII mode

2. INV-NO (2 bytes) : Inverter number (Omissible in one-to-one communication) ... 00 (30H, 30H) to 99 (39H,

39h), *(2AH)

The command is executed only when the inverter number matches up with that specified

using a parameter.

(When * is specified in broadcast communication, the inverter number is assumed to match

if all numbers except * match. When * is specified instead of each digit (two-digit number),

all inverters connected are assumed to match.)

If the inverter number does not match or if the inverter number is of one digit, the data will

be judged invalid and no data will be returned.

3. CMD (1 byte)

4. Communication No.(4 bytes)

: Communication number (See 11, “Parameter data.”)

5. Data (0 to 4 bytes): Write data (valid for the W and P commands only)

: Command (For details, see the table below.)

6. “&” (1 byte)

: Checksum discrimination code (omissible. When omitting this code, you also need to omit

the checksum.)

7. Sum (2 bytes)

: Checksum (omissible)

Add the ASCII-coded value of the last two digits (4 bits/digit) of the sum of a series of bits

(ASCII codes) from the start code to the checksum discrimination code.

Ex.: (R0000&??) CR

28H+52H+30H+30H+30H+30H+26H=160H

The last two digits represent the checksum. = 60

When omitting the checksum, you also need to omit the checksum discrimination

code.

8. “)” (1 byte)

9. CR (1 byte)

: Stop code (omissible)

: Carriage return code

„ Details of commands and data

CMD (1 byte)

Write data (0 to 4 bytes) Hexadecimal number

No data

Write data (0 to FFFF)

R (52H): RAM read command

W (57H): RAM/EEPROM write command

P (50H) RAM write command

Write data (0 to FFFF)

E6581315

„ Inverter → computer

At time of broadcast communication, returning of data is not executed, except for the inverters to be

returned, when the inverter number is not matched, and the inverter number has only one character.

This is because there will be a risk of that the returned data may be deformed.

„ Data returned when data is processed normally (ASCII mode)

　Omissible in one-to-one communication

Omissible

SUM ")"

(3.5bytes

Blank) (28H) 2 bytes

"("

INV-NO

CMD Communication No.

1 byte 4 bytes

DATA

"&"

CR 　(3.5bytes

0 to 4 bytes (26H) 2 bytes (29H) (0DH)

Blank)

　　　　Checksum area 　　　

　　 Omissible

1. “(“ (1 byte)

: Start code in ASCII mode

2. INV-NO (2 bytes) : Inverter number (omitted if it is not found in the data received) ... 00 (30H, 30H) to 99 (39H,

39H)

If the inverter number matches up with that specified using a parameter, data will be return-

ed to the computer. In broadcast communication, only the destination inverter (with a num-

ber matching up with the smallest effective number) returns data to the computer.

In broadcast communication, no data is returned from any inverters except the inverter

bearing a number that matches up with the smallest effective number.

Ex.: (*2R0000) CR -> (02R00000000) CR)

Data is returned from the inverter with the number 2 only, but no data is returned from

inverters with the number 12, 22 ....

3. CMD (1 byte)

: Command ... The command is also used for a check when an inverter is tripped.

Under normal conditions... The uppercase letter R, W or P is returned, depending on the

command received: R, W or P command.

When an inverter is tripped... The lowercase letter r, w or p is returned, depending on the

command received: R, W or P command.

(The command received is returned with 20H added to it.)

4. Communication No.(4 bytes) :

The communication number received is returned.

5. Data (0 to 4 bytes): Data ... The data read in is returned for the R command, while the data received is returned

for the W and P commands. If the data received is composed of less than 4 digits, it will be

converted into 4-digit data and returned.

Ex.: (W123412) CR → (W12340012) CR)

6. “&” (1 byte)

: Checksum discrimination code (omitted if it is not found in the data received)

7. Sum (2 bytes)

: Checksum ... Omitted if no checksum discrimination code is found in the data received.

ASCII-coded value of the last two digits (4 bits/digit) of the sum of a series of bits (ASCII

codes) from the start code to the checksum discrimination code.

8. “)” (1 byte)

9. CR (1 byte)

: Stop code (omitted if it is not found in the data received)

: Carriage return code

E6581315

• Data returned when data is not processed normally (ASCII mode)

In case an error occurs, communication error command (4EH(N) or 6EH(n)) and the error type num-

ber is returned to the computer in addition to the checksum. At time of broadcast communication of

the binary mode, returning of data is not executed except for the inverter to be returned (inverter

number 00H) and when the inverter number is not matched. This is because there will be a risk that

the returned data may be deformed.

Omissible　　　　　　　　　　　　　　　　　　　　　　　　　　 Omissible

(3.5bytes “(“

INV-NO

“N” or “n”

DATA

"&"

SUM

")"

CR (3.5bytes

Blank) (28H) 2 bytes

(4EH)　　(6EH)

4 bytes

(26H)

2 bytes

(29H) (0DH) Blank)

　　　 Checksum area

　　　Omissible

“(“ (1 byte)

: Start code in ASCII mode

“N” or “n” (1 byte)

:Communication error command ... This is also used for the checking of inverter trip.

“N” for the normal communication and “n” during the inverter trip.

INV-NO (2 bytes)

Data (4 bytes)

: Inverter number (omitted if it is not found in the data received) ... 00 (30H, 30H) to 99 (39H,

39H)

If the inverter number matches up with that specified using a parameter, data will be return-

ed to the computer. In broadcast communication, only the destination inverter (with a num-

ber matching up with the smallest effective number) returns data to the computer.

: Error code (0000~0004)

0000 ... Impossible to execute (Although communication is established normally, the

command cannot be executed because it is to write data into a parameter whose

setting cannot be changed during operation (e.g., maximum frequency) or the

EEPROM is faulty.)

0001 ... Data error (The data is outside the specified range or it is composed of too many

digits.)

0002 ... Communication number error (There is no communication number that matches.)

0003 ... Command error (There is no command that matches.)

0004 ... Checksum error (The checksum result differs.)

“)” (1 byte)

: Stop code ... This code is omitted if it is not found in the data received.

„ Examples:

(N0000&5C)_CR... Impossible to execute (e.g., a change of maximum frequency data during opera-

tion)

(N0001&5D)_CR... Data error (Data is outside the specified range.)

(N0002&5E)_CR... No communication number (There is no communication number that matches.)

(N0003&5F)_CR... There is no command that matches. (Commands other than the R, W and P

commands)

(Ex.: L, S, G, a, b, m, r, t, w ...)

(N0004&60)_CR... Checksum error (The checksum result differs.)

No data returned ... Format error or invalid inverter number

E6581315

4.1.2. Data transmission format used in binary mode

A communication number is used to specify a data item, data is written in hexadecimal form, and

data in transmission characters are represented by binary codes (HEX codes).

„ Computer → Inverter (binary mode)

Omissible in one-to-one communication　　　　 No data for the 52H (R) command

(3.5bytes

Blank) (2FH)

“/”

INV-NO

1 byte

CMD

1 byte

Communication No.

2 bytes

DATA

2 bytes

SUM

1 byte

(3.5bytes

Blank)

Checksum area

　　　　　　　　Not omissible

1. 2FH (“/”) (1 byte) : Start code in binary mode

2. INV-NO (2 bytes) : Inverter number (Omissible in one-to-one communication) ... 00H to 3FH ,FFH

In case the inverter number is other than FFH (broadcast communication), command is ex-

ecuted only when the inverter number coincides with the one designated with the panel. If

the inverter number is not matched, it will be judged invalid and the data is not returned.

3. CMD (1 byte)

: Command (For details, see the table below.)

52H (R) command: The size of the data following CMD is fixed to 3 bytes. (Communication

number: 2 bytes, checksum: 1 byte)

57H (W), 50H (P) and 47H (G) commands: The size of the data following CMD is fixed to 5

bytes.

(Communication number: 2 bytes, data: 2 byte, checksum: 1 byte)

Any command other than the above is rejected and no error code is returned.

4. Communication No.(2 bytes)

: Communication number (See 11, “Parameter data.”)

5. Data (2 bytes)

: 0000H to FFFFH

57H (W) and 50H (P) commands: Write data (An area check is performed.)

47H (G) command: Dummy data (e.g., 0000) is needed.

52H (R) command: Any data is judged invalid. (No data should be added.)

6. Sum (2 bytes)

: Checksum (not omissible) 00H to FFH

Value of the last two digits (1 byte) of the sum of a series of bits (codes) from the start code

of the data returned to the data (or to the communication number for the 52H (R) com-

mand)

Ex.: 2F 52 00 ?? ... 2FH+52H+00H+00H=81H

The last two digits (??) represent the checksum= 81

„ Details of commands and data

CMD (1 byte)

Write data (2 bytes) Hexadecimal number

No data

52H (R): RAM read command

57H (W): RAM/EEPROM write command

50H (P): RAM write command

47H (G): RAM read command (for two-wire networks)

Write data (0000H to FFFFH)

Dummy data (0000H to FFFFH)

E6581315

„ Inverter → computer (binary mode)

At time of broadcast communication of the binary mode, returning of data is not executed except for

the inverter to be returned (inverter number 00H) and when the inverter number is not matched. This

is because there will be a risk that the returned data may be deformed.

• Data returned when data is processed normally (Binary mode)

Omissible

(3.5bytes

Blank) (2FH)

“/”

INV-NO

1 byte

CMD

1 byte

Communication No.

2 bytes

DATA

2 bytes

SUM

1 byte

(3.5bytes

Blank)

Checksum area

　　　　　　　　Not omissible

1. 2FH (“/“) (1 byte) : Start code in binary mode

2. INV-NO (2 bytes) : Inverter number... 00H to 3FH (The inverter number is omitted if it is not found in the data

received.)

If the inverter number matches up with that specified from the operation panel, data will be

returned from the inverter. If the inverter number does not match, the data will be invalid

and no data will be returned.

3. CMD (1 byte)

: Command...The command is also used for a check when the inverter is tripped.

Under normal conditions...52H (R), 47H (G), 57H (W) or 50H (P) is returned, depending on

the command received.

When the inverter is tripped...The lowercase letter 72H (r), 67H (g), 77H (w) or 70H (p) is

returned with 20H added to it, depending on the command received.

4. Communication No. (4 bytes)

: The communication number received is returned.

5. Data (2 bytes)

: Data ... 0000H to FFFFH

The data read is returned for the 52H (R) and 47H (G) commands, while the data written is

returned for the 57H (W) and 50H (P) commands.

6. Sum (1 bytes)

: Checksum (not omissible) 00H to FFH

Value of the last two digits (1 byte) of the sum of a series of bits (codes) from the start code

to the data.

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2) Error Processing (Binary mode)

In case an error occurs, communication error command (4EH(N) or 6EH(n)) and the error type num-

ber is returned to the computer in addition to the checksum. At time of broadcast communication of

the binary mode, returning of data is not executed except for the inverter to be returned (inverter

number 00H) and when the inverter number is not matched. This is because there will be a risk that

the returned data may be deformed.

Omissible

(3.5bytes “/”

Blank) (2FH) 1 byte

INV-NO

Norn

(4EH)(6EH)

DATA

2 bytes

SUM

1 byte

(3.5bytes

Blank)

Checksum area 　　　　 Not omissible

Norn (1 byte)

Data (2 bytes)

: Communication error command ... This command is also used for a check when the in-

verter is tripped.

“4EH (N)” is returned under normal conditions, while “6EH (n)” is returned when the in-

verter is tripped.

: Error code (0000~0004)

0000 ... Impossible to execute (Although communication is established normally, the com-

mand cannot be executed because it is to write data into a parameter whose set-

ting cannot be changed during operation (e.g., maximum frequency) or the

EEPROM is faulty.)

0001 ... Data error (The data is outside the specified range or it is composed of too many

digits.)

0002 ... Communication number error (There is no communication number that matches.)

0004 ... Checksum error (The checksum result differs.)

No code returned ...Command error, format error (failure to receive the specified number of

bytes within 0.5 seconds, or an parity, overrun or framing error) or the

inverter number does not match or an inverter in broadcast communi-

cation in the binary mode except for the inverter for data returning (the

inverter numbered 00H).

„ Examples:

2FH, 4EH, 00H, 00H, 7DH ... Impossible to execute (e.g., a change of maximum frequency data

during operation)

2FH, 4EH, 00H, 01H, 7EH ... Data setting error (The data specified falls outside the specified

range.)

2FH, 4EH, 00H, 02H, 7FH ... No communication number (There is no communication number that

matches.)

2FH, 4EH, 00H, 04H, 81H ... Checksum error (The checksum result differs.)

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4.1.3. Transmission format of Block Communication

What is block communication?

Data can be written in and read from several data groups set in one communication by setting the

type of data desired for communication in the block communication parameters (, ,

 to ) in advance. Block communication can save the communication time.

Data is transmitted hexadecimal using the binary (HEX) code transmission characters. “Computer

→ inverter” is for writing only, while “Inverter → computer” for reply is for reading only.

„ Computer → Inverter (Block Communication)

Number of writing data groups x 2 bytes

Omissible

INV-NO

Num-

ber of

write

Num-

ber of

read

(3.5bytes

Blank)

Start

Code

“／”

CMD

“X”

Write

data1

High

Write

data1

Low

Write

data2

High

Write

data2

Low

SUM (3.5bytes

Blank)

data

groups

Checksum Area

1. 2FH(“/”) (1 byte) : Start code of binary mode

2. INV-NO (1 byte) : Inverter number. (Can be omitted in 1:1 communication): 00H to 3FH, FFH

Executed only when the inverter number matches the inverter number. Set on the panel, ex-

cept in FFH (broadcast communication).

Communication data will be invalidated and data will not be returned either if the inverter

number. Does not match.

3. CMD (1 byte)

4. Number of write data groups (1 byte)

: Specify the number of data groups to be written (00H to 02H).

: ‘X’ (Block communication command)

If specified outside of the range, data will be treated as a format error and data will not be re-

turned.

5. Number of read data groups (1 byte)

: Specify the number of data groups to be read (00H to 05H).

If specified outside of the range, data will be returned as “Number of read data groups = 0”

when returned by the inverter.

6. Write data1 (2 bytes)

: Needed when the number of write data groups is larger than 1.

Data to be written to the specified parameter selected by 

Dummy data is needed if the number of write data groups is larger than 1 even　though(none)

is selected for 

7. Write data2 (2 bytes)

: Needed when the number of write data groups is 2.

Data to be written to the specified parameter selected by 

Dummy data is needed if the number of write data groups is 2 even　though(none) is selected

for 

8. SUM (1 byte)

: Checksum (Cannot be omitted) 00H to FFH

Lower two digits (1 byte) of total sum from start code (SUM value not included)

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„ Block Write 1, 2

Select data, which is desired to be written in block communication, in block write Data 1 and 2 Pa-

rameters (, ). This parameter becomes effective when the system is reset, such as

when power is turned off. When the setting is completed, turn off and then on the power.

No. Block Write Data

For data details, see:

Deselect

　－

Command information 1 (FA00)

Command information 2 (FA20)

Frequency Command (FA01)

Terminal board output data (FA50)

Communication analog output (FA51)

“8.1 Command by communication”

* When “Deselect” is specified in the parameters, no data will be written even though write data is

specified.

„ Block Read 1 to 5

Select read data, which is desired to be read in block communication, in block read data 1 and 5 Pa-

rameters (to). This parameter becomes effective when the system is reset,

such as when power is turned off. When the setting is completed, turn off and then on the power.

No. Block Read Data

For data details, see:

Deselect

　－

Status information (FD01)

Output frequency (FD00)

Output current (FD03)

Output voltage (FD05)

Alarm Information (FC91)

PID feedback value (FD22)

Input terminal board monitor (FD06)

Output terminal board monitor (FD07)

V/II terminal boad monitor (FE36)

RR/S4 terminal board monitor (FE35)

RX terminal board monitor (FE37)

Input voltage (DC detection) (FD04)

Speed feedback frequency (FD16)

Torque (FD18)

“8.2 Monitoring from communication”

My monitor 1(FE60)

　－

My monitor 2(FE61)

　－

My monitor 3(FE62)

　－

My monitor 4(FE63)

　－

Free notes (F880)

“7.5 Free notes ()”

* V/II terminal board monitor (FE36), RR/S4 terminal board monitor (FE35) and RX terminal board

monitor (FE37) will become hold data during a trip. Otherwise, real-time data appears.

* “0000” will be returned as dummy data, if “0 (Deselect)” is selected for the parameter and “read” is

specified.

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„ Inverter → Computer

At time of broadcast communication of the binary mode, returning of data is not executed except for

the inverter to be returned (inverter number 00H) and when the inverter number is not matched. This

is because there will be a risk that the returned data may be deformed.

1) Normal processing

Omissible

Number of read data groups x 2 bytes

(3.5

bytes Code

Blank) “/”

Start

INV CMD

No. “Y”

Write Read Read Read Read Read Read Read Read Read Read SUM

Status data1 data1 data2 data2 data3 data3 data4 data4 data5 data5

(3.5

bytes

Blank)

Number

of Read

Data

high

low

high

low

high

low

high

low

high

low

Groups

Checksum area

1. 2FH “/” (1 byte)

2. INV-NO (1Byte)

：Start code in binary mode

：Inverter number･･･00H to 3FH

If the inverter number matches up with that specified from the operation panel, data will

be returned from the inverter. If the inverter number does not match, the data will be

judged invalid and no data will be returned.

Communication data will be invalidated and data will not be returned either if the in-

verter number does not match. (Inverter number is considered matched if it is omitted

during reception)

3. CMD(1Byte)

:‘Y’ (Block communication command [monitoring])

Lowercase letter ‘y’ during an inverter trip, including standing by for retrying and during

a trip.

4. Number of read data groups (1 byte)

: Return the number of data groups to be read (00H to 05H).

5. Write status (1 byte) : Return 00H to 03H.

* Failing to write in the specified parameter in the number of write data groups, set “1”

in the corresponding bit for the parameter failed to write. (See below.)

Bit Position

Data Type

－

 

6. Read data1 - 5 (2 bytes)

: Return according to the number of read data groups. “0000H” is returned as dummy

data if “0” is selected as a parameter.

Read data1: Data selected by . Read data2: Data selected by .

Read data3: Data selected by . Read data4: Data selected by .

Read data5: Data selected by .

7.SUM(1Byte)

: Checksum (Cannot be omitted) 00H to FFH

Lower two digits (1 byte) of total sum from start code of return data to read data.

„ Example

(When set as follows:  =  (Command information 1),  =  (frequency command),

 =  (status information), =  (output frequency),  =  (output current),  =  (output

voltage) and  =  (alarm information)

Computer → Inverter：2F 58 02 05 C4 00 17 70 D9

Inverter → Computer：2F 59 05 03 00 00 00 00 00 00 00 00 00 00 90 (When parameter is not set)

Inverter → Computer：2F 59 05 00 40 00 00 00 00 00 00 00 00 00 CD CD (When parameter is set)

Inverter → Computer：2F 59 05 00 64 00 17 70 1A 8A 24 FD 00 00 3D (During operation at 60Hz)

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2) Error Processing (Binary mode)

In case an error occurs, communication error command (4EH(N) or 6EH(n)) and the error type num-

ber is returned to the computer in addition to the checksum.

Omissible

(3.5bytes “/”

Blank) (2FH) 1 byte

INV-NO

Norn

(4EH)(6EH)

DATA

2 bytes

SUM

1 byte

(3.5bytes

Blank)

Checksum area 　　　　 Not omissible

“N” or “n” (1 byte) : Communication error command. Also for check during an inverter trip (includes standing

by for retrying and trip holding). “4EH (N)” when normal, “6EH (n)” during an inverter trip.

DATA (2 bytes)

: Error code (0004)

0004

: Checksum error (The checksum does not match)

No return : Command error, format error (specified number of bytes is not received in 1sec,

or parity error, overrun error or framing error), inverter number mismatch, and

inverter number other than 00H in broadcast communication.

„ Examples

Computer → Inverter : 2F 58 02 05 C4 00 17 70 D8

Inverter → Computer : 2F 4E 00 04 81 ... Checksum error

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4.2. Commands

Here are the communication commands available.

Command

R command Reads the data with the specified communication number.

Function

W command Writes the data with the specified communication number. (RAM and EEPROM).

P command Writes the data with the specified communication number. (RAM).

Reads the data with the specified communication number. (For binary mode only.

Dummy data is required for this command.)

G command

X command Block communication (Computer -> Inverter)

Y command Block communication (Inverter -> Computer)

„ W (57H) (RAM^*1/EEPROM^*2write)

This command is used to write new data into the parameter specified using it communication num-

ber. It writes data into the RAM and EEPROM. For parameters whose settings cannot be stored in

the EEPROM (e.g., parameter with the communication number FA00), the W (57H) command writes

data into the RAM only. It cannot be used to write data into read-only parameters (e.g., parameter

with the communication number FD?? or FE??).

Each time an attempt to write data is made, the inverter checks if the data falls within the specified

range. If this check reveals that the data falls outside the specified range, the inverter will reject it

and return an error code.

- Ex.: Setting the deceleration time (communication number: 0010) to 10 sec.

CR: Carriage return

Computer → Inverter

(W00100064)CR

Inverter → Computer

(W00100064)CR

…(10÷0.1=100=0064H)

Computer → Inverter

2F 57 00 10 00 64 FA

Inverter → Computer

2F 57 00 10 00 64 FA

…(10÷0.1=100=0064H)

Notice

♦ Do not write the same parameter to the EEPROM more than 10,000 times. The life time of EEPROM is

approximately 10,000 times.(Some parameters are not limited, please refer to the “9.Parameter data “)

The lifetime of EEPROM is approximately 10,000 times. When using the TOSHIBA inverter protocol and

the data does not need to be records, use P command (the data is written only to RAM).

„ Explanation of terms

*1: The RAM is used to temporarily store inverter operation data. Data stored in the RAM is cleared

when the inverter is turned off, and data stored in the EEPROM is copied to the RAM when the

inverter is turned back on.

*2: The EEPROM is used to store inverter operation parameter settings, and so on. Data stored in

the EEPROM is retained even after the power is turned off, and it is copied to the RAM when the

inverter is turned on or reset.

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„ P (50H) (RAM^*1write)

This command is used to rewrite data into the parameter specified using a communication number.

It writes data into the RAM only. It cannot be used to write data into any read-only parameters. Each

time an attempt to write data is made the inverter checks whether the data falls within the specified

range. If this check reveals that the data falls outside the range, the inverter will reject it and return

an error code.

- Ex.: Entering the emergency stop command (communication number: FA00) from the computer

Computer → Inverter

Inverter → Computer

(PFA009000)CR

…Command priority, emergency stop

command

Computer → Inverter

2F 50 FA 00 90 00 09

Inverter → Computer

2F 50 FA 00 90 00 09

„ R (52H) (Data read)

This command is used to read the setting of the parameter specified using a communication num-

ber.

- Ex.: Monitoring the electric current (communication number: FE03)

Computer → Inverter

(RFE03)CR

Inverter → Computer

(RFE03077B)CR

…Current: 1915 / 100 = 19.15%

Computer → Inverter

2F 52 FE 03 82

Inverter → Computer

2F 52 FE 03 07 7B 04

„ G (47H) (Data read)

This command is used to read the parameter data specified using a communication number. Alt-

hough this command is used for the previous model to control the operation of two or more inverters

in binary mode through a two-wire RS485 network, the “R” command can also be used without

problems for the VF-AS1 series.

To use the “G” command, however, dummy data (2 bytes) is needed.

This command is available only in binary mode.

- Ex.: Monitoring the electric current (communication number: FE03)

Computer → Inverter

Inverter → Computer

2F 47 FE 03 00 00 77

2F 47 FE 03 07 7B F9

* In this example, the data 00H sent from the computer to the inverter is dummy data.

„ S (53 H)/ s (73 H) Inter-drive communication command(RAM^*1Write)

This command is for using frequency command values in % (1 = 0.01%), instead of in Hz, and is for

synchronous-proportional operation in inter-drive communication. This command can also be

used in ordinary computer link communication.

When writing in the frequency command (FA01, FA05) is enabled and a parameter other than it is

specified, a communication number error will result. Data is written in the RAM only and at this

time the data check such as an upper limit and lower limit checking is not carried out.

Data is not returned from the inverters while this command is used. This command can be used

only in the binary mode.

For the details of the format, see “6.2 Transmission format for inter-drive communication.”

Use (%) as the unit for frequency command values specified by the command S, instead of (Hz),

and the receiving side converts units for frequency values to “Hz” in accordance with the point con-

version parameter. The conversion formula is shown below.

Frequency command value (Hz) =

Point 2 frequency (F813) − Point 1 frequency (F812)

x (Frequency command value (%)

Point 2 (F814) − Point 1 (F811)

− Point 1 (F811) + Point 1 frequency (F812)

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When Command “s” (lowercase letter) is received, the slave side judges that the master side is

tripped and operates in accordance with the inter-drive communication parameter (,

).

For detail, see "7. Communication parameters ".

- Examples: 50% frequency command (2-wire RS485 communication)

(If maximum frequency = Frequency for operation at 80Hz = 40Hz: 50% = 5000d = 1388H)

Master inverter → Slave inverter

Slave inverter → Master inverter

2F 53 FA 01 13 88 18

No return

„ X(58H)/Y (59H) (Block Communication Command)

Data selected in the block communication write parameters (,) is written in the

RAM. When returning data, data selected in block communication read parameters ( to

) is read and is returned.

For detail, see "4.1.3. Transmission format of Block Communication ".

- Examples: 60Hz operation command from communication and monitoring (Monitoring when al-

ready operating at 60Hz)

(Parameter Setting:  = , = ,  = ,  = ,  = ,  =

, = )

Computer → Inverter

Inverter → Computer

2F 58 02 05 C4 00 17 70 D9

2F 59 05 00 64 00 17 70 1A 8A 24 FD 00 00 3D

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4.3. Transmission errors

„ Table of error codes

Error name

Description

Error code

Impossible to exe- The command is impossible to execute, though communication was

0000

cute

established normally.

1 Writing data into a parameter whose setting cannot be changed

during operation (e.g., maximum frequency) ^*1

2 Writing data into a parameter while “” is in progress

Invalid data is specified.

Data error

0001

0002

Communication

number error

Command error

There is no communication number that matches.

The command specified does not exist.

0003 (ASCII mode)

No code returned (Binary

mode)

Checksum error

Format error

The Checksum does not match.

0004

The data transmission format does not match.

1 One-digit inverter number (ASCII mode)

2 The CR code is found in the designated position. (ASCII mode)

Ex.:Communication number of 4 digit or less. In the case of (R11)

CR, 11) CR is recognized as a communication number and

the CR code is not recognized, with the result that a format

error occurs.

No code returned

3 A code other then the stop code (“)”) is entered in the stop code

position.

Receiving error

A parity, overrun or framing error has occurred. ^*2

No code returned

*1: For parameters whose settings cannot changed during operation, see ”Table of parameters.”

*2: Parity error : The parity does not match.

Overrun error : A new data item is entered while the data is being read.

Framing error : The stop bit is placed in the wrong position.

* For the errors with “no code returned” in the above table, no error code is returned to avoid a data

crash.

If no response is received, the computer side recognizes that a communication error has occurred.

Retry after a lapse of some time.

* If the inverter number does not match, no processing will be carried out and no data will be re-

turned, though it is not regarded as an error.

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4.4. Broadcast communication function

Broadcast communication function can transmit the command (write the data) to multiple inverters

by one communication. Only the write (W, P) command is valid and the read (R, G) command is in-

valid. The inverters subject to the broadcast communication are the same to the independent com-

munication; 0 to 99 (00H - 63H) in the ASCII mode, and 0 to 63 (00H - 3FH) in the binary mode. To

avoid data deforming, the inverters to return data will be limited.

„ “Overall” broadcast communication (ASCII mode / Binary mode)

- ASCII Mode

If you enter two asterisks (**) in the inverter number position of the data transmission format, the

computer will send the data simultaneously to all inverters (with an inverter number between 0 and

99 (00 to 63H)) on the network.

- Binary Mode

To put "FF" to the specified place of the inverter number in the communication format validates the

broadcast communication and the command is transmitted to all the applicable inverters in the net-

work (inverter numbers from 0 to 63 (00 to 3FH)).

Data is returned from the inverter bearing the inverter number 00 only.

If you do not want inverters to return data, do not assign the number 00 to any inverter on the net-

work.

„ “Group” broadcast communication (ASCII mode only)

If you put “*?” In the inverter number position of the data transmission format, data will be sent

simultaneously to all inverters bearing a number whose digit in the one’s place in decimal notation

is”?”

If you put ”?*” In the inverter number position of the data transmission format, the data will be sent

simultaneously to all inverters bearing a number whose digit in the ten’s place in decimal notation

is”?”.

(“?”: Any number between 0 and 9.)

Data is returned only from the inverter bearing the smallest number in the same group of inverters

(i.e., inverter whose number in the position of ”*” is 0).

If you do not want inverters to return data to the computer, do not assign a number having a 0 in the

position of “*” to any inverter on the network.)

„ Examples of broadcast communication

Ex: Set the frequency setting for communication to 60Hz.

1 Host computer → Multiple inverters: broadcast communication (ASCII Mode)

Example of transmission of data from host computer to inverter: (**PFA011770)_CR

Example of data returned from inverter to host computer: (00PFA011770)_CR

Data is returned from the inverter numbered 00 only, while commands are issued to all inverters

connected to the network.

2 Host computer → A specific group of inverters: group communication (ASCII Mode)

Example of transmission of data from host computer to inverters: (*9PFA011770)_CR

Example of data returned from inverter to host computer: (09PFA011770)_CR

Data is returned only the inverter numbered 09 only, while commands are issued to a maximum

of 10 inverters bearing the number 09, 19, 29, 39, ... or 99.

E6581315

Host

computer

Block 2

Block 1

Inverter No.20 Inverter No.21

Inverter No.29

VF-AS1

Inverter No. 10 Inverter No.11

Inverter No.19

VF-AS1

*1: Error signal I/F

In broadcast communication, only the representative inverter in each block returns data to the host

computer. However, you can make the representative inverter in each block report the occurrence of

a problem in the block. To do so, follow these steps.

Set the timer function so that, if a time-out occurs, the inverter will trip (Ex.: = (sec)), set

the output terminal selection parameter (FL) so that trip information will be output through the output

terminal (=), and set the input terminal selection parameter (F) of the representative in-

verter in each block to “external input trip (emergency stop)” (=). Then, connect the input

terminal (F, CC) of the representative inverter to the FL terminal (FLA, FLC) of each of the other in-

verters in the same block (FLA-F, FLC-CC). In this setting, if an inverter trips, the representative in-

verter will come to an emergency stop, and as a result it will report the occurrence of a problem in its

block to the computer. (If the representative inverter returns a lowercase letter in response to a

command from the computer, the computer will judge that a problem has arisen in an inverter.) To

examine details on the problem that has arisen, the host computer accesses each individual inverter,

specifying its communication number. To make the computer issue a command to all inverters in

block 1 or block 2 shown in the figure above, specify “1*” or “2*”, respectively. In this system, inverter

No. 10 will return data to the computer if a problem arises in block 1, or inverter No. 20 if a problem

arises in block 2. For overall broadcast communication, specify “**”, in which case the inverter with

the communication number “00” will return data to the computer.

In this example, if you want the computer to maintain communication without bringing an represen-

tative inverter to an emergency stop, set its input terminal selection parameter to “disabled

(=) but not to “external input trip (emergency stop).” This setting causes the host computer

to check the setting of the input terminal information parameter (Communication No.=DF06, bit 0) of

the representative inverter, and as a result enables the computer to detect the occurrence of a

problem.

CAUTION:

Data from inverters will be deformed if inverters of the same number are connected on the network.

Never assign same single numbers to inverters on the network.

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4.5. Examples of the use of communication commands

Here are some examples of the use of communication commands provided for the VF-AS1 series of

inverters.

Inverter numbers and checksum used in ASCII mode are omitted from these examples.

„ Examples of communication

- To run the motor in forward direction with the frequency set to 60 Hz from the computer

Computer → Inverter

Inverter → Computer

(PFA011770)CR

…Set the operation frequency to 60 Hz.

(60 / 0.01 Hz = 6000 = 1770H)

(PFA00C400)CR

…Set to “forward run” with commands and frequency

instruction from the computer enabled.

Computer → Inverter

2F 50 FA 01 17 70 01

Inverter → Computer

2F 50 FA 01 17 70 01

2F 50 FA 00 C4 00 3D 2F 50 FA 00 C4 00 3D

- To monitor the output frequency (during 60 Hz operation)

Computer → Inverter

Inverter → Computer

(RFD00)CR

(RFD001770)CR

…Set the operation frequency to 60 Hz.

(60÷0.01Hz=6000=1770H)

Computer → Inverter

2F 52 FD 00 7E

Inverter → Computer

2F 52 FD 00 17 70 05

- To monitor the status of the inverter

Computer → Inverter

Inverter → Computer

(RFD01)CR

(rFD010003)CR

…For details on statuses, see 8.2 “Monitoring from

the computer.” (Stop status, FL output status, trip

status (r command))

Computer → Inverter

2F 52 FD 01 7F

Inverter → Computer

2F 72 FD 01 00 03 A2

- To check the trip code (when the inverter is tripped because of )

…For details on trip codes, see “Trip code monitor” in 8.2, “Monitoring

from the computer.” (18H = 24d “” trip status)

Computer → Inverter

(RFC90)CR

Inverter → Computer

(rFC900018)CR

Computer → Inverter

2F 52 FC 90 0D

Inverter → Computer

2F 72 FC 90 00 18 45

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4.6. Examples of Communication programs

According to the hardware configuration of the computer used, select a serial output port. To use an

RS232C port on the computer, you will have to prepare an RS232C-RS485 conversion unit sepa-

rately.

An USB-RS485 conversion unit (USB0001Z) is available as our standard offering.

Ex. 1: BASIC program for monitoring the output frequency continuously (RS232C, ASCII mode)

(Toshiba version of Advanced BASIC-86 Ver. 3.01.05J)

◊ Monitoring the output frequency continuously

1) Examples of programs

10 OPEN "COM1:9600,E,8,1" AS #1

20 A$=”FE00”

--- 9600 baud, even parity, 8-bit length, 1 stop bit

--- Specifies the communication number for

monitoring the output frequency.

--- Transmits data to the inverter.

Note: The carriage return code is added

automatically.

30 PRINT #1,"("+”R”+A$+")"

40 INPUT#1,B$

50 AAA$=“&H”+MID$(B$,7,4)

--- Receives data returned from the inverter.

--- Extracts only data items from the data re-

turned.

60 F$=LEFT$(STR$(VAL(AAA$)/100),6)

70 PRINT " Output frequency =";F$+“Hz”

80 GOTO 20

--- Converts data into decimal form.

--- Displays the output frequency.

--- Repeats.

2) Examples of program execution results (stop command issued during 80 Hz operation)

Output frequency = 80 Hz ...

Output frequency = 79.95Hz

Output frequency = 0Hz

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Ex. 2: BASIC program for executing an input command with checksum (RS232C, ASCII mode)

(Toshiba version of Advanced BASIC-86 Ver. 3.01.05J)

◊ Checking if the maximum frequency setting has been changed correctly

1) Examples of programs

10 OPEN "COM1:9600,E,8,1" AS #1

--- 9600 baud, even parity, 8-bit length, 1 stop bit

--- Reads in data to be sent to the inverter.

--- Adds “(“ and “&” to the read data in.

20 INPUT"Send Data=";A$

30 S$="("+A$+"&"

40 S=0

50 L=LEN(S$)

60 FOR I=1 TO L

Calculates the number of bits (checksum).

70 S=S+ASC(MID$(S$,I,1))

80 NEXT I

90 CHS$=RIGHT$(HEX$(S),2)

100 PRINT #1,"("+A$+"&"+CHS$+")"

--- Sends the data including the checksum result

to the inverter.

110 INPUT #1,B$

120 PRINT "Receive data= ";B$

130 GOTO 20

--- Receives data returned from the inverter.

--- Displays the data received.

--- Repeats.

2) Examples of program execution results

Send Data=? R0011

--- Reads the maximum frequency (0011).

--- 1F40 (Maximum frequency: 80 Hz)

--- Changes the maximum frequency to 60 Hz

(1770).

Receive Data= (R00111F40&3D)

Send Data=? W00111770

Receive Data= (W00111770&36)

Send Data=? R0011

Receive Data= (R00111770&31)

--- Reads the maximum frequency (0011).

--- 1770 (Maximum frequency: 60 Hz)

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Ex. 3 BASIC program for communication tests (RS232C, ASCII mode)

(Toshiba version of Advanced BASIC-86 Ver. 3.01.05J)

◊ Accessing a parameter (with error code.)

1) Examples of programs

100 INPUT "Baud rate=9600/4800/2400/1200";SPEED$

---- Selects a baud rate.

110 INPUT "Parity=even(E)/odd(O)";PARITY$

---- Selects parity.

120 OPEN "COM1:"+SPEED$+","+PARITY$+",8,1"AS #1

130 INPUT "Send data";B$

140 PRINT #1,B$

---- Enters a command.

150 C$=""

160 T=TIMER

170 COUNT=(TIMER-T)

180 IF COUNT >3 THEN 270

190 IF COUNT <0 THEN T=TIMER

200 IF LOC(1)= 0 THEN A$="":GOTO 220

210 A$=INPUT$(1,#1)

220 IF A$ <>CHR$(13) THEN 240

230 GOTO 290

---- Prevents an increase in the number of digits.

---- Carriage return

(CR) to finish reading in.

240 IF A$="" THEN 160

250 C$=C$+A$

260 GOTO 160

270 COLOR @0,7:PRINT "!!! There is no data to return. !!! ";:COLOR @7,0:PRINT

280 GOTO 130

---- Repeats.

290 PRINT A$;

300 C$=C$+A$

310 PRINT "Return data=";c$;

320 GOTO 130

---- Repeats.

2) Examples of program execution results (In this example, the inverter number is 00.)

Baud rate=9600/4800/2400? 9600

Parity=even(E)/odd(O)? E

Send data? (00R0011)

Return data= (00R00111770)

Send data? ()

---- Selects 9600 baud.

---- Select E (even parity).

---- Carries out test communication.

---- Error

!!! There is no data to return. !!!

Send data? (R0011)

Return data= (R00111770)

Send data?

---- No data is returned.

E6581315

Ex. 4 A VisualBaisc program for the ASCII mode communication

(VisualBaisc is the registered trademark of the U.S. microsoft company.)

◊ Accessing a parameter

1) Sample program executive example (Monitor of the output frequency (FD00))

Transmission and reception of the optional data like in the following example can be done by do-

ing "the arrangement of the form control" of the explanation and "the description of the code" with

mentioning later.

Reply data from the inverter

are 1770H (6000d) with this

example.

As for the unit of the output

frequency (FD00),1= 0.01Hz,

the Inverter is being operated

in 60.00Hz.

2)Arrangement of the control on the form

Two TextBox, two Labels , three CommandButton and one MsComm are arranged on the form as

follows.

E6581315

3)The description of the code

Private Sub Form_Load()

Form1.Show

'**********************************************************************

' Setting the labels (Initialization)

'**********************************************************************

Label1.Caption = "Data for transmission"

Label2.Caption = "Received data"

Command1.Caption = "Transmit"

Command2.Caption = "Clear"

Command3.Caption = "Exit"

'**********************************************************************

' Setup of communication (Initialization)

'**********************************************************************

MSComm1.RThreshold = 0

MSComm1.InputLen = 1

MSComm1.CommPort = 1

MSComm1.InBufferCount = 0

MSComm1.OutBufferCount = 0

Form1.MSComm1.Settings = "9600,E,8,1"

Form1.MSComm1.InputMode = comInputModeText

'**********************************************************************

' A serial port is opened. (Initialization)

'**********************************************************************

If False = MSComm1.PortOpen Then

MSComm1.PortOpen = True

End If

'**********************************************************************

' Data are received.

'**********************************************************************

dummy = DoEvents()

If MSComm1.InBufferCount Then

Text1.Text = Text1.Text & MSComm1.Input

End If

Loop

End Sub

'**********************************************************************

' The contents of the text box are transmitted.

'**********************************************************************

Private Sub Command1_Click()

MSComm1.Output = Text2.Text & Chr(13)

End Sub

'**********************************************************************

'The contents of the text box are removed.

'**********************************************************************

Private Sub Command2_Click()

Text2.Text = ""

Text1.Text = ""

End Sub

'**********************************************************************

'A serial port is closed, end

'**********************************************************************

Private Sub Command3_Click()

If True = MSComm1.PortOpen Then

MSComm1.PortOpen = False

End If

End

End Sub

E6581315

5. MODBUS-RTU protocol

The MODBUS-RTU protocol of VF-AS1 supports only part of the MODBUS-RTU protocol. Only

two commands are supported, “03: Multiple data read (limited only to two bytes)” and “06: Word

writes.” All data will be binary codes.

„ Parameter Setting

• Protocol selection (, )

Select “MODBUS－RTU (,  = ) in the communication selection parameters.

“TOSHIBA” (, =) is set for communication protocol selection in initial shipment set-

ting. (See “3. Communication protocol.”)

* Caution when selecting MODBUS-RTU

Note that selecting this protocol disables the inter-drive communication functions set with parame-

ters  and , and the block communication functions set with parameters ,

 and  to .

• Inverter number ()

Inverter numbers. 0 to 247 can be specified in MODBUS-RTU. “0” is allocated to broadcast com-

munication (no return). Set between 1 and 247.

 : Baud rate (2-wire RS485) : Communication speed (4-wire RS485)

 : Parity (common to 2-wire RS485 and 4-wire RS485)

„ Data Exchange with Inverters

The inverters are always ready to receive messages and perform slave operation in response to

computer requests.

A transmission error will result if the transmission format does not match. The inverters will not re-

spond if a framing error, parity error, CRC error or an inverter number mismatch occurs. If no re-

sponse is received, the computer side recognizes that a communication error has occurred.

Transmit data again.

(1) In case spacing for more than 3.5 bytes are provided before characters, all data immediately

preceding it will be aborted. Data will sometimes be aborted if spacing for 1.5 bytes or more is

provided between characters. (See “3.1. About the handling of received frames.”)

(2) Communication will be effective only when inverter numbers match or the communication mode

is 0 (Broadcast communication). If there is no inverter number that matches or 0 (broadcast

communication) is specified, no response is returned by any inverter.

(3) Message reception will end if spacing for more than 3.5 bytes are provided at the end of charac-

ters. (See “3.1. About the handling of received frames.”)

(4) If no communication take place within the time specified using the timer function, the computer

will assume that a communication error has occurred and trip the inverter. The timer function is

disabled when the inverter is turned on or initialized. For details, see Section 7.3, “Timer function,

Communication time-out time action.”

(5) On executing the command received, the inverter returns data to the computer. For the response

time, see Appendix 2, “Response time.”

„ Caution:

Communication is not possible for about two seconds after the power is supplied to the inverter until

the initial setting is completed. If the control power is shut down due to an instantaneous voltage

drop, communication is temporarily interrupted.

E6581315

5.1. MODBUS-RTU transmission format

MODBUS-RTU sends and receives binary data without a frame-synchronizing start code and de-

fines the blank time to recognize the start of a frame. MODBUS-RTU decides the data that is first

received subsequently as the first byte of a frame after a blank time for 3.5 bytes at the on-going

communication speed.

5.1.1. Read command (03)

„ Computer → Inverter *The text size is 8 bytes fixed.

Commu- Commu- Number Number

Inverter

No.

nication

No.

(high)

nication

No.

(low)

of Data

Groups

(high)

of Data

Groups

(low)

CRC

(low)

CRC

(high)

Command

(3.5bytes

Blank)

(3.5bytes

Blank)

1) Inverter No.. (1 byte)

: Specify an inverter number between 0 and 247 (00H to F7H).

Command processing will be executed only broadcast communication “0” and with

those inverters that match set inverter numbers. Data will not be returned if “0”

(broadcast communication) and inverter numbers do not match.

2) Command (1 byte)

: Set the read command (03H fixed).

3) Communication No.. (2 bytes)

: Set in the order of high to low numbers.

4) Number of data groups (2 bytes) : Set the number of data words 0001 (fixed) in the order of high to low numbers.

5) CRC (2 bytes)

: Set generation results of CRC in the order of low to high numbers.. For the

method to generate CRC, see “5.2 CRC Generation.” Note that the setting se-

quence is reversal to that of others.

„ Inverter → Computer (Normal return) *The text size is 7 bytes fixed.

Inverter

No.

Number of Read data Read data

CRC

(low)

CRC

(high)

Command

(3.5bytes

Blank)

(3.5bytes

Blank)

Data

(high)

(low)

1) Command (1 byte)

2) Number of data

: Read command (03H fixed) will be returned.

: A number of data bytes (02H fixed) will be returned. The number of data groups for

transmission to the inverters is 2 bytes and 01H fixed. Note that the number of data re-

turned by the inverters is 1 byte and 02H fixed.

3) Read data (2 bytes)

: Returned in the order of read data (high) and (low).

„ Inverter → Computer (Abnormal return) *The text size is 5 bytes fixed.

CRC

(low)

CRC

(high)

Inverter No. Command Error Code

(3.5bytes

Blank)

(3.5bytes

Blank)

1) Command (1 byte)

2) Error code (1 byte)

: 83H fixed (Read command error) (Command + 80H)

: See “4.3 Transmission errors.”

„ Example: Reading output frequency (During 60Hz operation)

(Computer → inverter)

(Inverter → computer)

01 03 FD 00 00 01 B5 A6

01 03 02 17 70 B6 50

„ Example: Data specification error

(Computer → inverter)

(Inverter → computer)

01 03 FD 00 00 02 F5 A7

01 83 03 01 31

E6581315

5.1.2. Write command (06)

„ Computer → Inverter *The text size is 8 bytes fixed.

Commu- Commu-

Command nication nication

No. (high) No. (low)

Inverter

No.

Write Data Write Data

(high) (low)

CRC

(low)

CRC

(high)

(3.5bytes

Blank)

(3.5bytes

Blank)

1) Inverter No. (1 byte)

: Specify an inverter number between 0 and 247 (00H to F7H).

Command processing will be executed only broadcast communication “0” and with

those inverters that match set inverter numbers. Data will not be returned if “0”

(broadcast communication) and inverter numbers do not match.

: Set the write command (06H fixed).

2) Command (1 byte)

3) Communication No. (2 bytes) : Set in the order of high to low numbers.

4) Write data (2 bytes)

5) CRC (2 bytes)

: Set in the order of high to low write data.

: Set generation results of CRC in the order of low to high numbers. For the method to

generate CRC, see “5.2 CRC Generation.” Note that the setting sequence is rever-

sal to that of others.

„ Inverter → Computer (Normal return) *The text size is 8 bytes fixed.

Commu- Commu-

Inverter

No.

Write Data Write Data

(high) (low)

CRC

(low)

CRC

(high)

Command nication

nication

(3.5bytes

Blank)

(3.5bytes

Blank)

No. (high) No. (low)

: Write command (06H fixed) will be returned.

: Returned in the order of write data (high) and (low).

1) Command (1 byte)

2) Write data (2 bytes)

„ Inverter → Computer (Abnormal return) *The text size is 5 bytes fixed.

CRC

(low)

CRC

(high)

Inverter No. Command Error Code

(3.5bytes

Blank)

(3.5bytes

Blank)

1) Command (1 byte)

2) Error code (1 byte)

: 86H fixed (Read command error) (Command + 80H)

: See “4.3 Transmission errors.”

„ Example: Writing in frequency command value (FA01) (60Hz)

(Computer → inverter)

01 06 FA 01 17 70 E6 C6

(Inverter → computer)

01 06 FA 01 17 70 E6 C6

„ Example: Communication number error

(Computer → inverter)

01 06 FF FF 00 00 89 EE

01 86 02 C3 A1

(Inverter → computer)

Note

▼ The EEPROM life is 10,000 operations.

Do not write in the same parameter that has an EEPROM more than 10,000 times.

E6581315

5.2. CRC Generation

“CRC” is a system to check errors in communication frames during data transmission. CRC is

composed of two bytes and has hexadecimal-bit binary values. CRC values are generated by the

transmission side that adds CRC to messages. The receiving side regenerates CRC of received

messages and compares generation results of CRC regeneration with CRC values actually received.

If values do not match, data will be aborted.

„ Flow

A procedure for generating a CRC is:

CRC generation ( )

1, Load a 16–bit register with FFFF hex (all 1’s). Call this

the CRC register.

CRC initial data: FFFF

2. Exclusive OR the first 8–bit byte of the message with the

low–order byte of the 16–bit CRC register, putting the

result in the CRC register.

Byte counter n = 0

Nｏ

Byte counter n < Length

Yes

3. Shift the CRC register one bit to the right (toward the

LSB), zero–filling the MSB. Extract and examine the

LSB.

CRC = (CRC XOR n^thsend byte

(0 expanded to word (higher 8

bits))

4. (If the LSB was 0): Repeat Step 3 (another shift).

(If the LSB was 1): Exclusive OR the CRC register with

the polynomial value A001 hex (1010 0000 0000 0001).

Bit counter = 0

Nｏ

Bit counter < 8

Yes

5. Repeat Steps 3 and 4 until 8 shifts have been per-

formed. When this is done, a complete 8–bit byte will

have been processed.

C = (Remainder of CRC ÷ 2)

ＣＲＣ >> １

Nｏ

6. Repeat Steps 2 through 5 for the next 8–bit byte of the

message. Continue doing this until all bytes have been

processed.

Is remainder (C)

other than 0?

Yes

CRC＝

(CRC XOR generating polyno-

mial (A001))

7. The final contents of the CRC register is the CRC value.

8. When the CRC is placed into the message, its upper

and lower bytes must be swapped as described below.

Bit counter +1

Byte counter +1

End (Return CRC)

5.3. Error codes

In case of the following errors, the return commands from the inverters are added 80h to the com-

mands received by the inverters. The following error codes are used.

Error Code

Description

Command error (Returned when a command other than 03 or 06 is received)

Communication number error (A communication number is not found when Com-

mand 03 or 06 is received)

Data range error (Data range error when Command 03 or 06 is received

Unable to execute (Command 06 is being received and data cannot be written)

(1) Writing in write-disable-during-operation parameter

(2) Writing in parameter that is executing TYP

E6581315

6. Inter-drive communication

Inter-drive communication (communication between inverters) are used, for example, when per-

forming speed proportional control or load sharing torque control of two or more inverters without

using a PLC or computer. The command is instructed by the operation from the master inverter’s

panel or analog input, etc.

With the Inter-drive communication function, the master inverter continues to transmit the data se-

lected by the parameters to all the slave inverters on the same network. The master inverter uses

the S command for outputting instructions to the slave inverters, and the slave inverters do not re-

turn the data. (See chapter 4.2 "Command".) Network construction for a simple synchronized op-

eration and speed-proportional operation can be created by this function.

* If the master inverter trips, the slave inverters display the blinking error code “t” and come to a full

stop (0Hz).

Restoring the master inverter that has tripped returns the slave inverters to working order.

* With the communication time-out parameters f803and f804, you can specify what the

slave inverters should do (continue to operate, issue an alarm or trip) if a cable is broken or the

master inverter is turned off during operation.

* To use the inter-drive communication function, select “TOSHIBA Inverter Protocol” (,

=) in the communication protocol selection parameters. “TOSHIBA Inverter Protocol”

(, =) is set for communication protocol selection in Shipment setting. (See “3.

Communication protocol.”)

Slave 1 (50Hz)

VF-AS1

Slave 2 (40Hz)

VF-AS1

Slave 3 (30Hz)

VF-AS1

Master (60Hz)

VF-AS1

Analog input

<Notes>

Speed command can be transmitted but the run / stop signal is not issued. Slave station should have an indi-

vidual stop signal or the function to stop the action by the frequency reference. (Setting is necessary for :

Operation start frequency, : Operation start frequency hysteresis .)

For continuing the operation by the last received command value in the case of a communication breakdown,

communications time-out time () to trip the slave inverters. The master inverter does not trip even though

the communication breakdown happens. To trip the master inverter, provide an interlock mechanism by installing

an FL fault relay point or the like from the slave side.

E6581315

QWiring (2-wire RS485 communication)

Straight

Slave

Master

Slave

CN1

RXD+/TXD+

RXD-/TXD-

RXD+/TXD+

RXD-/TXD-

RXD+/TXD+

RXD-/TXD-

RXD+/TXD+

RXD-/TXD-

Pin-4

Pin-5

Pin-8

(Pin-3)

Terminating resistance

120Ω-1/2W

* Never use pin-7 (P11).

QWiring (4-wire RS485 communication)）

Straight

Cross

Straight

Master

CN1

Slave

RXA

RXB

TXA

TXB

Slave

RXA

RXB

TXA

TXB

Slave

RXA

RXB

TXA

TXB

Pin-4

Pin-5

Pin-3

Pin-6

RXA

RXB

TXA

TXB

Pin-8

(

Pin-2)

Terminating resistance

120Ω-1/2W

* Never use pin-1 (Open) and pin-7 (P11).

* You do not need to connect the master receive lines (pins 4 and 5) or the slave send lines (pins 3

and 6).

E6581315

„ Setting of parameter

●Protocol selection (, ) Shipment setting: 0 (TOSHIBA)

Protocol setting with all inverters (both master and slave inverters) engaged in inter-drive commu-

nication

0: Set the TOSHIBA.

* Inter-drive communication are disabled when the MODBUS-RTU protocol is selected.

* This parameter is validated after resetting the inverter or rebooting the power supply.

● Setting of master and slave inverters for communication between inverters (setting of master and

slave) (, ) ... Shipment setting = 

Assign one master inverter in the network. Other inverters should be the slave inverters.

*Specify only one inverter as the master. In case two or more inverters are designated for the

master inverter in the same network, data will collide.

- Setting to the master inverter

Set data desired for sending from the master side to the slave side.

: Master (sends a frequency command)

: Master (sends an output frequency)

: Master (sends a torque command)

: Master (sends an output torque command)

- Setting to the slave inverters

Set the desired action on the slave side that will be needed when the master trips.

0: Slave (issues a 0Hz command if something goes wrong with the master) (when f806and

f826are set to 3and 4, respectively.))

(The output frequency is limited to the lower limit frequency.)

1: Slave (continues operation if something goes wrong with the master)

Note: If the master inverter trips when an output frequency is specified for it, the operation fre-

quency of the slave inverters become 0Hz because tripping of the master inverter causes its

output frequency to drop to 0Hz.

2: Slave (trips for emergency stop if something goes wrong with the master)

The way they make an emergency stop depends on the setting of f603(emergency stop).

*This parameter is validated after resetting the inverter or rebooting the power supply.

• Send waiting time () ... Shipment setting = 

- Setting to the master inverter

Specify a waiting time if you want the master to issue commands to slaves with a given delay.

● Frequency setting mode selection 1 (fm0d) ･･･ Shipment setting = 2: RR/S4 input

Designate a target of speed command input for the inverter to the parameter .

- Setting to the master inverter

Select an option other than RS485 communication (fm0d≠5or 6).

- Setting to the slave inverters

Select from between:

fm0d=5: 2-wire RS485 communication input

fm0d=6: 4-wire RS485 communication input

E6581315

„ Relating communication parameters

Following parameters should be set or changed if necessary.

• Baud rate (, )... Shipment setting = : 19200bps

Baud rate of all inverters in the network (master and slave) should be same network.

• Parity () ... Shipment setting = : Even parity

Parity of all inverters in the network (master and slave) should be same network.

• Communication time-out time() ... Shipment setting = 

Operation is continued by the last received command value in the case of a communication break-

down. To stop the operation of inverter, provide a communication time-out time (ex. = sec-

ond) to the slave inverters. The master inverter does not trip even though the communication break-

down happens. To trip the master inverter, provide an interlock mechanism by installing a FL fault

relay point or the like from the slave side.

• Frequency point selection (, )

Adjusted to the system.

See chapter “6.1 Speed proportional control” for details.

„ Setting example of parameters (2-wire RS485 communication)

Parameters relating to the master side (example)

Parameters relating to the slave side (example)







Master (transmission of output frequency

 Slave (If the master inverter trips, all slave inverters stop

operating.)

 Selection of communication protocol

(Toshiba inverter protocol)

 Communication time-out (ex. 1 second)

 Communication baud rate (same to the master side)

 Parity (same to the master side)

 Terminal block (ex. Driven by F, ST)

( Run and stop of operation is controlled with the frequency

reference value by setting the “run frequency”.)

(%) (100% at FH))

Selection of communication protocol

(Toshiba inverter protocol)

Communication baud rate

(ex. 19200bps)

Parity (even parity)

Example: Panel





 Example: RR/S4 input



 Operation panel RS485 (2-wire) communication input

Master (sends a torque command)



?

2-wire RS485

Adjusted to the system Point 1 setting (%)







Ditto

Point 2 frequency (Hz)

Point 2 setting (%)

Point 2 frequency (Hz)





RS485 communication input

Load sharing gain input mode selection (ex. Operation

panel input enabled)

 Panel load sharing gain (ex. Sharing of half of the com-

mand value)

E6581315

6.1. Proportional control of speed

Proportional control of frequency can be performed in two ways: control by selecting frequency

points and control by adjusting the ratio to the maximum frequency. This section explains propor-

tional control of inverters by means of a master inverter (inter-drive communication), although the

AS1 series inverters are ready for proportional control by means of the “S” command even when

they are operated under the control of a computer (computer-linked communication) (in the latter

cases, read the master inverter as the computer).

Proportional control can also be performed in units of Hz using ordinary write commands (W and P

commands) (frequency point selection only). For proportional control in units of %, however, the S

command should be used.

* For proportional control by selecting frequency points, the gradient can be set variously according

to the way each inverter is used. For proportional control by controlling the ratio to the maximum

frequency, settings can be made easily without consideration of the rate at which the frequency is

increased or decreased to the target frequency.

• Data sent by the master inverter to slave inverters in inter-drive communication mode (frequency

command value)

Master side fc×10000

　 fc(%)＝

　　　　　　(1=0.01%)

Master side FH

* Fractions under 1 (0.01%) are omitted. Therefore, an error of 0.01% is introduced at the maxi-

mum.

• Conversion of the frequency command received by a slave inverter (when the “frequency point

selection” option is not selected)

The value obtained by the following conversion calculation is written in RAM as a frequency com-

mand value.

Slavereceivedata(%)× Slave side FH

fc( Hz ) =

　　　(1=0.01Hz)

10000

* Fractions under 1 (0.01Hz) are omitted. Therefore, an error of 0.01Hz is introduced at the maxi-

mum.

[Diagram of speed proportional control]

* fc=frequency reference, FH=maximum frequency

Operation performed by the slave

Operation performed by the

master (or use of S command)

(

)

Point selection 

(Hz)

Points not selected

Masterfc

MasterFH

Slave receive data

Mastersenddata＝

×10000

Data ( Hz )＝

× Slave FH

10000

Point conversion

Points selected

(Hz)

(

)

Setting 2 fc 

Slave command

(^)

Setting 1 fc

Point1

(^)

Point2

(^)

(%)

Master command

Point2fc − Point1fc

Point2−Point1

Slavecommand＝

×( Mastercommand－Point1）＋Point1fc

SlaveFH

Data＝

×10000

E6581315

• If the “Frequency point selection” function is disabled (=)

The operation frequency (frequency command value) of the inverters are calculated using the fol-

lowing equations, with the received data in the following equation used as the data received from

the master inverter when inverters are operated under the control of a master inverter (inter-drive

communication), or with the received data in the following equation used as the data received from

the computer when inverters are operated under the control of a computer (computer-linked opera-

tion).

Slaverecievedata(%)× Slave side FH

fc( Hz ) =

　　　(Hz)

10000

Example: 　　　　　　　　　　　　　

Maximum frequency Operation frequency command value

　 Unit:1=0.01Hz

Master (Fc)

Slave 1

　100.00Hz (10000)

　 90.00Hz (9000)

　 80.00Hz (8000)

50.00Hz (5000)

45.00Hz (4500)

40.00Hz (4000)

Slave 2

Master side fc ×10000 5000×10000

Master send data：fc(%) =

= 5000 = 50%

Master side FH

10000

5000× 9000

Slave1: fc( Hz ) =

= 4500 = 45Hz

10000

5000×8000

Slave2 : fc( Hz ) =

= 4000 = 40Hz

10000

• If the “Frequency point selection” function is enabled (≠)

When inverters are operated under the control of a mater inverter, the operation frequency (fre-

quency command value) of the slave inverters are calculated using the following equations.

When inverters are operated under the control of a computer, read “command from the master

inverter” in the following equations as “command from the computer.”

Point 2 frequency − Point1 frequency

fc( Hz ) =

×（Master command(%) − Point1）＋Point1 frequency

Point 2 − Point1

　(Hz)

Example: 　　　　　　　　　Units: Frequency unit 1 = 0.01Hz, Point setting unit 1 = 0.01%

Maximum

frequency

()

Point 1

setting

()

－

Point 1 fre- Point 2 set- Point 2

Frequency

(Fc)

quency

ting

frequency

()

－

()

－

()

－

Master (Fc) 100.00Hz

(10000)

50.00Hz

(5000)

Slave 1

100.00Hz

(10000)

0.00%

(0)

0.00Hz

(0)

100.00%

(10000)

90.00Hz

(9000)

45.00Hz

(4500)

Slave 2

100.00Hz(1

0000)

0.00%

(0)

0.0Hz

(0)

100.00%(10

000)

80.00Hz

(8000)

40.00Hz

(4000)

Data sent by the master inverter

Master side fc ×10000 5000×10000

Master send data : fc(%) =

= 5000 = 50%

Master side FH

10000

Both slaves 1 and 2: Result of a conversion made on the slave side

Slavereceivedata(%)× Slave side FH 5000×10000

fc( Hz ) =

= 5000 = 50Hz

10000

Both slaves 1 and 2: Result of a conversion to % made prior to a conversion to point frequency

fc( Hz )×10000 5000×10000

fc(%) =

= 5000 = 50%

Slaveside FH

10000

Results of conversions to point frequency (for the equation used, see above.)

9000 − 0

10000 − 0

8000 − 0

Slave1: fc( Hz ) =

×(5000 − 0 )＋0 = 4500 = 45Hz 　　

Slave2 : fc( Hz ) =

×(5000 − 0)＋0 = 4000 = 40Hz

10000 − 0

E6581315

6.2. Transmission format for inter-drive communication

Data type is handled in hexadecimal notation and the transmission characters are treated with the

binary (HEX) code.

The transmission format is basically the same to the case of binary mode. S command is used and

the slave inverters do not return the data.

„ Master inverter → Slave inverter (Binary mode)

Omissible

(3.5bytes

Blank) (2FH)

“/”

INV-NO

1 byte

CMD

1 byte

Communication No.

2 bytes

DATA

2 bytes

SUM

1 byte

(3.5bytes

Blank)

Checksum area

　　　　　　　　Not omissible

1) INV-NO (1 byte)

: Inverter number

This is always excluded at the master inverter side at time of inter-drive communication, and

can be added when the user utilize this data for the purpose of proportional operation.

(When this code is added, only the inverter concerned will accept the data.)

: Command

2) CMD (1 byte)

53H(“S”) or 73(“s”) command ... command for inter-drive communication

When the master inverter is not tripping, this will be 53H(“S”).

When the master inverter is tripping, this will be 73H(“s”).

3) Communication number (2 bytes)

Specify “FA01” for two-wire RS485 communication.

Specify “FA05” for four-wire RS485 communication.

: Data of frequency command value.

4) DATA (2 bytes)

(0000H to FFFFH (no range check))

As for the S command, see section 4.2 “Commands”, and see chapter “6 Inter-drive communication function” for the

communication of inverters.

E6581315

7. Communication parameters

The settings of communication-related parameters can be changed from the operation panel and

the external controller (computer). Note that there are two types of parameters: parameters whose

settings take effect immediately after the setting and parameters whose settings do not take effect

until the inverter is turned back on or reset.

Com-

munica-

tion

Default

setting

Title

Function

Adjustment range

Unit

Valid

Reference

Section 7.1

Number.

0: 9600bps

Baud rate

(2-wire RS485)

0800

1: 19200bps

2: 38400bps

0: Non parity

1: Even parity

2: Odd parity

After reset.



0801

0802

0803

Parity (common)

After reset.

Real time

Section 7.1

Section 7.2

Section 7.3







Inverter number

(common)

Communication

time-out time

(common)

0-247

0:OFF

1-100s

2-wire

4-wire

t alarm

Err5 trip

t alarm

Err5 trip

Communication

time-out action

(common)

t alarm

Err5 trip

0804

0805

Real time

Section 7.3

Section 7.4





t alarm

Err5 trip

Send waiting time 0.00: Default

(2-wire RS485) 0.01-2.00s

0.01s

0.00

0:Slave (issues a 0Hz command if some-

thing goes wrong with the master)

1:Slave (continues operation if something

goes wrong with the master)

Inverter-to-inverter 2:Slave (trips for emergency stop if

0806

communication (2-

wire RS485)

something goes wrong with the master)

3:Master (sends a frequency command)

4:Master (sends an output frequency)

5.Master (sends a torque command)

6.Master (sends an output torque com-

mand)

After reset.



Chapter 6

Protocol selection 0: TOSHIBA

0807

0810

After reset.

Real time





Chapter 3

(2-wire RS485)

1:MODBUS-RTU

0:Disabled

Frequency point

selection

1:2-wire RS485

2:4-wire RS485

Section 6.1

3:Communication add option

0811

0812

0813

0814

Point 1 setting

0-100%

Real time









Point 1 frequency 0-Hz

Point 2 setting 0-100%

Point 2 frequency 0-Hz

0.01Hz

0.0

Section 6.1

100

60.0

0.01Hz

Communication

speed

(4-wire RS485)

Send waiting time 0.00: Normal

(4-wire RS485) 0.01-2.00s

0: 9600bps

1: 19200bps

2: 38400bps

0820

0825

After reset.

Real time

Section 7.1

Section 7.4





0.01s

0.00

E6581315

Reference

Com-

munica-

tion

Default

setting

Title

Function

Adjustment range

Unit

Valid

Number.

0:Slave (issues a 0Hz command if some-

thing goes wrong with the master)

1:Slave (continues operation if something

goes wrong with the master)

2:Slave (trips for emergency stop if

something goes wrong with the master)

3:Master (sends a frequency command)

4:Master (sends an output frequency)

5.Master (sends a torque command)

6.Master (sends an output torque com-

mand)

Inverter-to-inverter

communication

setting (4-wire

RS485)

0826

After reset.



Chapter 6

Chapter 3

Protocol selection 0: TOSHIBA

0829

0870

After reset.





(4-wire RS485)

1: MODBUS-RTU

0: Deselect

Block write data 1

1: Command information 1 (FA00)

2: Command information 2 (FA20)

3: Frequency command (FA01)

4: Terminal board output data

(FA50)

Section

4.1.3

0871

Block write data 2



5: Communication analog data

(FA51)

0: Deselect

0875

0876

0877

0878

Block read data 1

Block read data 2

Block read data 3

Block read data 4









1: Status information (FD01)

2: Output frequency (FD00)

3: Output current (FD03)

4: Output voltage (FD05)

5: Alarm information (FC91)

6: PID feedback value (FD22)

7: Input terminal board monitor (FD06)

8: Output terminal board monitor (FD07)

9: VI/IIterminal board monitor (FE36)

10: RR/S4 terminal board monitor (FE35)

11:RX terminal board monitor (FE37)

12:Input voltage (DC detection) (FD04)

13:Speed feedback frequency (FD16)

14:Torque (FD18)

Section

4.1.3

After reset.

0879

0880

Block read data 5





15:MY monitor 1 (FE60)

16:MY monitor 2 (FE61)

17:MY monitor 3 (FE62)

18:MY monitor 4 (FE63)

19:Free notes (F880)

Free notes

0-65535

Real time

Section 7.5

E6581315

7.1. Baud rate(, ) , Parity ()

•Communication baud rate and parity bit should be uniform inside the same network.

•This parameter is validated by resetting the power supply.

7.2. Inverter number()

This parameter sets individual numbers with the inverters.

Inverter numbers should not be duplicate inside the same network.

Receiving data will be canceled if inverter numbers specified in individual communication and set by

a parameter do not match.

This parameter is validated from the communication after change

Data range: 0 to 247 (Initial value: 0)

Parameters can be selected between 0 and 247. Note that the communication protocols limit in-

verter numbers as follows:

● TOSHIBA Inverter Protocol ASCII mode: 0 to 99

● TOSHIBA Inverter Protocol Binary mode: 0 to 63

● MODBUS Protocol: 0 to 247 (0: Broadcast communication)

E6581315

7.3. Communication time-out time (), Communication time-out action (f804)

The timer function is mainly used to detect a break in a cable during communication, and if no data

is sent to an inverter within the preset time, this function makes the inverter trip () or issue

an alarm (). With the communication time-out action parameter (), you can specify what

the inverter should do (trip, issue an alarm or do nothing) if a time-out occurs.

„ How to set the timer

By default, the communication time-out time parameter () is set to  (OFF).

* Timer adjustment range

About 1 sec. (01H) to about 100 sec. (64H) / Timer off (0H)

„ How to specify what an inverter should do if a time-out occurs

By default, the communication time-out action parameter () is set to  ( trip) for both

2-wire and 4-wire RS485 communication.

* Selection of time-out action (Range: 0 to 8 ... For details refer to “6. Communication parameters.)

The action of the inverter at the occurrence of a time-out can be selected from among “do noth-

ing,” “trip ()” and “alarm ()” individually for two-wire and four-wire RS485 communica-

tion.

„ How to start the timer

If the timer is set from the operation panel, it will start automatically the instant when communication

is established for the first time after the setting.

If the timer is set from the computer, it will start automatically the instant when communication is

established after the setting.

If the timer setting is stored in the EEPROM, the timer will start when communication is established

for the first time after the power has been turned on.

Note that, if the inverter number does not match or if a format error occurs, preventing the inverter

from returning data, the timer function will assume that no communication has taken place and will

not start.

„ How to disable the timer

To disable the timer, set its parameter to 0.

Ex.: To disable the timer function from the computer (To store the timer setting in the EEPROM)

Computer → Inverter

Inverter → Computer

(W08030)CR

(W08030000)CR

... Sets the timer parameter to 0 to disable it.

„ Timer

Time-out period

The timer measures the time

elapsed before the inverter ac-

knowledges receipt of data after it

acknowledged receipt of the previ-

ous data.

Computer link

PC → INV

INV → PC

Master INV

to Slave

INV

Master INV

to Slave

INV

Inter-drive

communication

E6581315

7.4. Send waiting time (, )

Use this function for the following case:

When the data response from the inverter is too quick after the PC had sent the data to the inverter,

PC process cannot get ready to receive the data, or when the USB/RS485, RS485/RS232C con-

verter is used, changeover of sending and receiving data takes much time in the converter process.

Functional specification:

A time for sending data is prolonged longer than the preset time (, ), until the inverter

returns the data to the PC, after it finishes receiving the data (in case of an inter-drive communica-

tion, until the inverter returns the next data to the PC, after it has sent the data.) In case the inverter's

processing capacity requires longer setting time, the value more than this time will be the set value.

(The parameter makes the inverter wait for more than the set time.)

Setting range:  to seconds (10ms to 2000ms)

If the set value is , this function becomes invalid and the interval time for sending data is set to the

maximum capacity of the inverter. To obtain a quick response for sending data, set value .

Time elapses more than

transmission waiting time.

Computer link

→

PC INV

→

INV PC

Inter-drive

Master INV

communication

to Slave INV

Master INV to

Slave INV

Time elapses more than the

transmission waiting time.

7.5. Free notes()

This parameter allows you to write any data, e.g., the serial number of each inverter or parameter

information, which does not affect the operation of the inverter.

E6581315

8. Commands and monitoring from the computer

Across the network, instructions (commands and frequency) can be sent to each inverter and the

operating status of each inverter can be monitored.

8.1. Communication commands (commands from the computer)

„ Communication command (Communication number: FA00, FA04)

Commands can be executed on inverter frequencies and operation stop through communication.

The VF-AS1 series can enable command and frequency settings through communication irrespec-

tive of settings of the command mode selection () and frequency setting mode selection 1

(). However, if “48 (49): Forced switching from communication to local,” “56 (57): Forced

continuous operation,” or “58 (59): Specified speed operationj” is set by input terminal function se-

lection ( to ), a change to a command other than communication and to a frequency

command is feasible through a contact on the terminal board.

Once the communication command (FA00, FA04) is set to enable communication command priority

and frequency priority, both priorities will be enabled unless OFF is set, power is turned off or is re-

set, or factory default setting () is selected. Emergency stop is always enabled even though

communication command priority is not set.

Table 1 Data construction of communication commands (communication number: FA00, FA04)

bit Specifications

Remarks

Preset speed operation Preset speed operation is disabled or preset

frequencies 1

speed operation frequencies (1-15) are set by

specifying bits for preset speed operation frequen-

cies 1-4.

Preset speed operation

frequencies 2

(0000: Preset speed operation OFF,

001-1111: Setting of preset speed operation

frequencies (1-15))

Preset speed operation

frequencies 3

Preset speed operation

frequencies 4

Motor selection (1 or 2)

(THR 2 selection)

PI control

Motor 1

(THR 1)

Motor2

(THR2)

THR1 : 

THR2 : 

Normal operation

Accelera-

PI OFF

Acceleration/deceleration

Accelera-

AD1 : , 

pattern selection (1 or 2) tion/deceleration pattern tion/deceleration pattern AD2 : , 

(AD2 selection)

DC braking

1 (AD1)

OFF

2 (AD2)

Forced DC braking

Jog run

OFF

Forward/reverse run se-

lection

Forward run

Reverse run

10 Run/stop

Stop

Standby

OFF

Run

Coast stop

Emergency stop

Reset

11 Coast stop command

12 Emergency stop

13 Fault reset

Always enabled, “E” trip

No data is returned from the inverter.

Enabled regardless of the set-

ting of 

OFF

14 Frequency priority selec-

tion

OFF

Enabled

15 Command priority selec-

tion

OFF

Enabled

Enabled regardless of the set-

ting of 

Note: The acceleration/deceleration change command OR with Bit 8 and 9 of Communication num-

ber FA20 and FA22.

Ex.: Forward run command used in two-wire RS485 communication (PFA008400) CR

1 is specified for bit 15 (communication command: enabled) and bit 10 (operation command).

BIT15

BIT0

FA00:

Ex.: Reverse run command used in two-wire RS485 communication (PFA008600) CR, (PFA00C600) CR

8600H : To disable frequency instructions from the computer

C600H : To enable also frequency instructions from the computer

E6581315

„ Communication command2 (Communication Number : FA20, FA22)

This command is enabled only when the communication command is enabled. Set Bit 15 of Com-

munication Command 1 (communication Number: FA00, FA04) to “1” (enable). When enabling the

communication command by Communication Command 1, commands by communication can be

given the priority irrespective of the setting of the command mode selection parameter ().

However, if “48 (49): Forced switching from communication to local,” “56 (57): Forced continuous

operation,” or “58 (59): Specified speed operationj” is set by input terminal function selection

( to ), the enabled command and frequency will be given the priority.

Once enabled, this setting will be enabled till disable is set (0 setting), power is turned off or is reset,

or factory default setting () is selected.

Table 2 Data construction of communication command 2 (FA20, FA22)

Bit

Function

Remarks

Control switching

electric power quantity

reset

Speed control

Torque control

Electric power quantity

(FE76, FE77) reset

ＯＦＦ

Reset

(Reserved)

－

Normal

－

Forcibly braked

Enabled

Brake released

Braking request (BC)

Preliminary excitation

Brake release (B)

Braking answer (BA)

Brake applied

Maximum

deceleration

Normal

Enabled

forced stop

Acceleration/deceleration

pattern selection 1

Select Acceleration/ de-

celeration 1 - 4 by combi-

nation of two bits

00: Acceleration/deceleration 1

01: Acceleration/deceleration 2

10: Acceleration/deceleration 3

11: Acceleration/deceleration 4

AD1: , 

Acceleration/deceleration

pattern selection 2

AD2: , 

AD3: , 

AD4: , 

00: V/F 1

01: V/F 2

10: V/F 3

11: V/F 4

V/Fswitching 1

Select V/F 1 - 4 by combi-

nation of two bits

V/Fswitching 2

00: Torque limit 1

01: Torque limit 2

10: Torque limit 3

11: Torque limit 4

Torque limit switching 1

Torque limit switching 2

Select torque limit 1 - 4 by

combination of two bits

Gain 1: , 

Gain 2: , 

Speed gain 1/2

(Reserved)

Gain 1

Gain 2

－

Note: The acceleration/deceleration change command ORs with Bit 6 of Communication number

FA00 and FA04.

Set Bit 6 of FA00 and FA04 to “0” and use FA20 and FA22 when changing acceleration/deceleration

in four types. Acceleration/deceleration 4 will be set when both Bit 8 of Communication number

FA20 and FA22 (or Bit 6 of Communication number FA00 and FA04) and Bit 9 of Communication

number FA20 and FA22 are set.

E6581315

„ Frequency setting from the computer “Communication Number: FA01, FA05”

Setting range: 0 to maximum frequency (fh)

This frequency command is enabled only when the frequency command by communication is en-

abled. To make frequency commands from the computer valid, set the frequency setting mode se-

lection parameter (fmod) to RS485 communication (communication No. 0004: 5 (2-wire RS485

communication input) or 6 (4-wire RS485 communication input) or select the “Command priority”

option (bit 14 of FA00 and FA04: 1 (enabled)). In this case, frequency commands by communica-

tion will be enabled independent of fmodsetting.

However, enabled commands and frequencies are given the priority if “48 (49): Forced switching

from communication to local,” “56 (57): Forced continuous operation,” or “58 (59): Specified speed

operation” is set by input terminal function selection (f11oto f118).

Once enabled, this frequency setting will be enabled till disable is set (0 setting), power is turned off

or is reset, or factory default setting (typ) is selected.

Set a frequency by communication hexadecimal in Communication Number FA01, FA05.

(1=0.01Hz (unit))

Example: Operation frequency 80Hz command by 2-wire RS485 communication (PFA011F40) CR

80Hz=80÷0.01=8000=1F40H

„ Torque command setting from the computer “2-wire RS485 communication: FA30,

4-wire RS485 communication: FA32

This section explains how to set a torque command value for inverters. The torque command value

set here takes effect if torque commands from the computer are valid when the inverters are in tor-

que control mode (in cases where torque control is selected with the terminal board or with a com-

munication command when ( is set to 4 or 8).

To make torque commands from the computer valid, set the torque command selection parameter

 (communication No. 0420) to 5 (2-wire RS485 communication input) or 6 (4-wire RS485

communication input). Once torque commands from the computer have been set, they remain valid

until they are changed, the inverters is turned off or reset, or the parameter  for returning set-

tings to their defaults is selected. (The settings of FA30 and FA32 are not stored in EEPROM.

Therefore, they are cleared when the inverter is turned off or reset.)

When setting a torque for torque commands from the computer, specify a torque in hexadecimal

(unit: 1=0.01%, two-wire RS485 communication: FA30 or four-wire RS485 communication: FA32).

Example: 50% torque command (PFA321388)

50%=50÷0.01=5000=1388H

E6581315

„ Terminal board output data (FA50)

The output terminal board on each inverter can be directly controlled with the computer.

To use this function, select functions 92 to 105 in advance for the output terminal function selection

parameters f130to f138, f168andf169. If bit 0 through bit 6 of terminal board

output data (FA50) are set with the computer, data specified (0 or 1) can be sent to any output ter-

minal.

Data composition of terminal board output data (FA50)

Bit

Output terminal function

Specified data output 1

OFF

(Output terminal no.: 92, 93)

Specified data output 2

(Output terminal no.: 94, 95)

Specified data output 3

(Output terminal no.: 96, 97)

Specified data output 4

(Output terminal no.: 98, 99)

Specified data output 5

(Output terminal no.: 100, 101)

Specified data output 6

(Output terminal no.: 102, 103)

Specified data output 7

(Output terminal no.: 104, 105)

－

OFF

－

7 to 15

Example of use: To control only the OUT1 terminal with the computer

To turn on the OUT1 terminal, set the output terminal function selection 1 parameter

(f130) to 92 (output terminal function selection 1 (positive logic)) and specify 0001H for

FA50.

FA50:

BIT15

BIT0

„ FM analog output (FA51)

The FM analog terminal on each inverter can be directly controlled with the computer.

To use this function, set the FM terminal meter selection parameter (fmsl) to 31 (communication

data output).

This makes it possible to send out the data specified as FM analog output data (FA51) through the

FM analog output terminal. Data can be adjusted in a range of 0 to 2047 (resolution of 11 bits).

For details, refer to “Meter setting and adjustment” of the instruction manual included with the

inverter.

„ AM analog output (FA52)

The AM analog terminal on each inverter can be directly controlled with the computer.

To use this function, set the AM terminal meter selection parameter (amsl) to 31 (communication

data output).

This makes it possible to send out the data specified as AM analog output data (FA52) through the

AM analog output terminal. Data can be adjusted in a range of 0 to 2047 (resolution of 11 bits).

For details, refer to “Meter setting and adjustment” of the instruction manual included with the

inverter.

E6581315

8.2.Monitoring from the computer

This section explains how to monitor the operating status of the inverter from the computer.

„ Monitoring of the output frequency from the computer (FD00, FE00)

Output frequency (current status): “Communication Number FD00” (minimum unit: 0.01Hz)

Output frequency (status immediately before the occurrence of a trip): “Communication Number

FE00” (minimum unit: 0.01Hz)

The current output frequency is read out in hexadecimal in units of 0.01Hz. For example, if the out-

put frequency is 80Hz, 1F40H (hexadecimal number) is read out. Since the minimum unit is 0.01Hz,

1F40H (hexadecimal number) = 8000 (decimal number) x 0.01 = 80 (Hz)

Example: Monitoring of the output frequency (operation frequency: 50Hz) ・・・ (1F40H=8000d,

8000×0.1=80Hz)

　Computer→Inverter　　Inverter→Computer

(RFD00)CR

　　　(RFD001F40)CR

The following items are also calculated in the same way.

• FD22 (PID feedback value).................................Unit: 0.01Hz

• FD16 (speed feedback) ......................................Unit: 0.01Hz

• FD29 (input power) .............................................Unit: 0.01kW

• FD30 (output power) ...........................................Unit: 0.01kW

„ Monitoring of the output current with the computer (FD03, FE03)

Output current (current status): “Communication Number FD03” (minimum unit: 0.01Hz)

Output current (status immediately before the occurrence of a trip): “Communication Number FE03”

(minimum unit: 0.01Hz)

The current output current is read out in hexadecimal in units of 0.01%. For example, if the output

current of an inverter with a current rating of 4.8A is 2.4A (50%), 1388H (hexadecimal number) is

read out. Since the minimum unit is 0.01%, 1388H (hexadecimal number) = 5000 (decimal number)

x 0.01 = 50 (%)

Example: Monitoring of the output current (output current: 90%) ・・・ (2328H=9000d,

9000×0.01=90%)

　Computer→Inverter　　Inverter→Computer

(FRD03)CR

　　　(RFD032328)CR

The following items are also calculated in the same way.

• FD05 (output voltage) .........................................Unit: 0.01% (V)

• FD04 (DC voltage) ..............................................Unit: 0.01% (V)

• FD18 (torque)......................................................Unit: 0.01% (N·m) ^*

* If data on the motor connected to the inverter is entered with parameters f405to f415,

100% of the monitored torque closely agrees with the rated torque of the motor.

E6581315

„ Input terminal board status (FD06, FE06)

Input terminal board status (current status): “Communication Number FD06”

Input terminal board status (status immediately before the occurrence of a trip): “Communication

Number FE06”

Using terminal function selection parameters, functions can be assigned individually to the termi-

nals on the input terminal board.

If a terminal function selection parameter is set to 0 (no function assigned), turning on or off the cor-

responding terminal does not affect the operation of the inverter, so that you can use the terminal as

you choose.

When using a terminal as a monitoring terminal, check beforehand the function assigned to each

terminal.

Data composition of input terminal board status (FD06, FE06)

Bit

Terminal name

Function (parameter title)

Input terminal function selection 1 (f111)

Input terminal function selection 2 (f112)

Input terminal function selection 3 (f113)

Input terminal function selection 4 (f114)

Input terminal function selection 5 (f115)

Input terminal function selection 6 (f116)

Input terminal function selection 7 (f117)

Input terminal function selection 8 (f118)

Input terminal function selection 9 (f119)

Input terminal function selection 10 (f120)

Input terminal function selection 11 (f121)

Input terminal function selection 12 (f122)

Input terminal function selection 13 (f123)

Input terminal function selection 14 (f124)

Input terminal function selection 15 (f125)

Input terminal function selection 16 (f126)

RES

OFF

Example: Data set for FE06 when the F and S1 terminals are ON = 0011H

BIT15 bit0

FE06:

E6581315

„ Output terminal board status (FD07, FE07)

Output terminal board status (current status): “Communication Number FD07”

Output terminal board status (status immediately before the occurrence of a trip): “Communication

Number FE07”

Using terminal function selection parameters, functions can be assigned individually to the termi-

nals on the output terminal board.

When using a terminal as a monitoring terminal, check beforehand the function assigned to each

terminal.

Data composition of output terminal board status (FD07, FE07)

Bit

Terminal name

Function (parameter title)

Output terminal function selection 1 (f130)

Output terminal function selection 2 (f131)

Output terminal function selection 3 (f132)

Output terminal function selection 4 (f133)

Output terminal function selection 5 (f134)

Output terminal function selection 6 (f135)

Output terminal function selection 7 (f136)

Output terminal function selection 8 (f137)

Output terminal function selection 9 (f138)

Output terminal function selection 10 (f168)

Output terminal function selection 11 (f169)

－

OUT1

OUT2

OUT3

OUT4

OFF

OUT5

OUT6

11 to 15

－

Example: Data set for FE07 when both the OUT1 and OUT2 terminals are ON = 0003H

BIT15 bit0

FE07:

„ Monitoring of the analog input with the computer (FE35 to FE39)

RR terminal board monitor: “Communication Number FE35”

VI/II terminal board monitor: “Communication Number FE36”

RX terminal board monitor: “Communication Number FE37”

AI1 terminal board monitor : “Communication Number FE38”

AI2 terminal board monitor: “Communication Number FE39”

These monitors can also be used as A/D converters irrespective of the inverter’s control.

RR terminal board monitor, VI/II terminal board monitor and AI2 terminal board monitor are capable

of reading the data from external devices in a range of 0.01 to 100.00% (unsigned data: 0H to

2710H).

RX terminal board monitor and AI1 terminal board monitor are capable of reading the data from ex-

ternal devices in a range of -100.00 to +100.00% (signed data: D8F0H to 2710H).

If analog input mode is selected with the frequency setting mode selection parameter, however,

keep in mind that any data entered via an analog terminal is regarded as a frequency command.

E6581315

„ Inverter operating status 1 (FD01, FE01)

Inverter status 1 (current status): Communication Number FD01

Inverter status 1 (status immediately before the occurrence of a trip): Communication Number FE01

Bit Specifications

Remarks

Failure FL

Failure

No output

Not tripped

Output in progress

Tripped

Trip statuses include 

and trip retention status.

Alarm

No alarm

Alarm issued

Reserved

Motor section (1 or 2) Motor 1 (THR 1)

(THR 2 selection)

Motor 2 (THR 2)

PI control OFF

PI control

permitted

PI control

prohibited

Accelera-

tion/deceleration

Acceleration/

deceleration

Acceleration/

deceleration pat- AD2 :, 

AD1 :, 

pattern selection (1 or pattern 1 (AD 1)

tern 2 (AD 2)

DC braking

OFF

Forced DC braking

Jog run

Forward/reverse run

Forward run

Stop

Reverse run

Run

10 Run/stop

11 Coast stop (ST=OFF)

12 Emergency stop

ST=ON

ST=OFF

Not emergency

stop status

Start-up process

Emergency stop

status

13 Standby ST=ON

Standby

Standby: Initialization completed,

not failure stop status, not alarm

stop status (MOFF, LL forced

stop or forced stop due to a

momentary

power

failure),

ST=ON, and RUN=ON

14 Standby

Start-up process

Standby

Standby: Initialization completed,

not failure stop status, and not

alarm stop status (MOFF, LL

forced stop or forced stop due to

a momentary power failure)

15 Reserved

E6581315

„ Inverter operating status 2 (FD42, FE42)

Inverter status 2 (current status): Communication Number FD42

Inverter status 2 (status immediately before the occurrence of a trip): Communication Number FE42

Bit

Function

Remarks

Control mode switching

Speed control

(Simple posi-

tioning)

Torque control

Electric Power Counting

(FE76,FE77) status

(Reserved)

Counting

Resetting

(Reserved)

Preliminary excitation

(Reserved)

Normal

Operation

(Reserved)

Maximum deceleration forced

stop

Normal

Operation

Acceleration/deceleration

pattern selection1

Acceleration/deceleration

00:Acceleration/deceleration 1 Acceleration/ decelera-

01:Acceleration/deceleration 2 tion 1 - 4 can be specified

10:Acceleration/deceleration 3 by combination of two

11:Acceleration/deceleration 4 bits

pattern selection2

V/Fswitching 1

Select V/F 1 - 4 by com-

bination of two bits

00: V/F 1

01: V/F 2

10: V/F 3

11: V/F 4

V/Fswitching 2

Torque limit switching 1

Torque limit switching 2

00: Torque limit 1

01: Torque limit 2

10: Torque limit 3

11: Torque limit 4

Gain 1

Select torque limit 1 - 4

by combination of two

bits

Speed gain 1/2

(Reserved)

Gain 2

Gain 1: , 

Gain 2: , 

„ Inverter operating status 3 (FD49, FE49)

Inverter status 3 (current status): Communication Number FD49

Inverter status 3 (current status): Communication Number FE49

Bit

Function

Remarks

0 to 11 (Reserved)

Not achieved

Achieved

Related parameters

Acceleration/deceleration

completion (RCH)

f102

Not achieved

Achieved

Related parameters

Specified speed reach (RCHF)

f101, f102

14 to 15 (Reserved)

E6581315

„ Inverter operating command mode status (FD45, FE45)

The monitor of the command mode that the present condition is enabled

Command mode status (current status): “Communication Number FD45”

Command mode status (status immediately before the occurrence of a trip): “Communication Num-

ber

Data

Enabled command

Terminal input enabled

Operation panel input enabled

Operation panel RS485 (2-wire) communication input

Internal RS485 (4-wire) communication input

Communication option input

„ Inverter operating frequency mode status (FD46, FE46)

The monitor of the frequency command mode that the present condition is enabled

Note that Preset speed operation frequencies is given the priority independent of the frequency

mode, in which case this monitor will be disabled, in case Preset speed operation frequencies is

selected.

Frequncy mode status (current status): Communication Number FD46

Frequncy mode status (status immediately before the occurrence of a trip): Communication

Number FE46

Data

Enabled frequency

VI/II input

RR/S4 input

RX input

Operation panel input enabled

Operation panel RS485 (2-wire) communication input

Internal RS485 (4-wire) communication input

Communication option input

Optional AI1

Optional AI2

255

UP/DOWN frequency

RP pulse input

High-speed pulse input

Binary/BCD input

Preset speed operation

E6581315

„ Alarm information monitor (FC91)

Remarks

Bit

Specifications

Over-current alarm

(Code displayed on the panel)

Normal

Alarming

 flickering

 flickering

Inverter overload alarm

Motor overload alarm

Overheat alarm

 flickering

 flickering

 flickering

Overvoltage alarm

Main circuit undervoltage alarm

(Reserved)

Low current alarm

Normal

Alarming

Over-torque alarm

Braking resistor overload alarm

Cumulative operation hours

alarm

11 (Reserved)

12 (Reserved)

13 (Reserved)

At the time of the instant black-

Decelerating, Related:  setting

stopping

Decelerating, Related:  setting

stopping

out, Forced deceleration/stop

An automatic stop during the

lower limit frequency continu-

ance

„ Cumulative operation time alarm monitor (FE79)

Bit

Specifications

Fan life alarm

Remarks

Normal

Alarm issued

Circuit board life alarm

Main-circuit capacitor life alarm

User set alarm

4-15 (Reserved)

E6581315

„ Trip code monitor (current status: FC90: historic records: FE10 to FE13)

Data

(hexadeci-

mal number)

(decimal

number)

Code

Description

No error

nerr

oc1

Over-current during acceleration

Over-current during deceleration

Over-current during constant speed operation

Over-current in load at startup

U-phase arm overcurrent

oc2

oc3

ocl

ocai

oca2

oca3

ephi

epho

op1

V-phase arm overcurrent

W-phase arm overcurrent

Input phase failure

Output phase failure

10 Overvoltage during acceleration

11 Overvoltage during deceleration

12 Overvoltage during constant speed operation

13 Over-LOAD in inverter

14 Over-LOAD in motor

15 Dynamic braking resistor overload

16 Overheat

op2

op3

ol1

ol2

olr

17 Emergency stop

18 EEPROM fault

eep1

eep2

eep3

err2

err3

err4

err5

err6

19 Initial read error

20 Initial read error

21 Inverter RAM fault

22 Inverter ROM fault

23 CPU fault

24 Communication time-out error

25 Gate array fault

26 Output current detector error

err7

27 Option error

err8

29 Low current operation status

30 Undervoltage (main circuit)

32 Over-torque trip

up1

33 Ground fault trip

ef1

34 Ground fault trip

ef2

36 Dynamic braking abnormal element

37 Overcurrent during acceleration (element overheat)

38 Overcurrent during deceleration (element overheat)

ocr

oc1p

oc2p

oc3p

etn

39 Overcurrent during fixed speed operation (element overheat)

40 Tuning error

41 Inverter type error

etyp

e-10

e-11

e-12

e-13

oh2

42 Analog input terminal overvoltage

43 Abnormal brake sequence

44 Disconnection of encoder

45 Speed error

46 External thermal

47 Step-out (for PM motors only)

50 Terminal input error

sout

e-18

e-19

e-20

e-21

e-22

e-23

51 Abnormal CPU2 communication

52 V/f control error

53 CPU1 fault

54 Abnormal logic input voltage

55 Option 1 error

E6581315

56 Option 2 error

e-24

e-25

e-26

etn1

etn2

etn3

57 Stop position retaining error

58 CPU2 fault

84  tuning error

85  tuning error

86 Motor constant setting error

„ Inverter model (capacity) code (FB05)

Data

Model

Data

(decimal number)

(hexadecimal number)

VFAS1-2004P

VFAS1-2007P

VFAS1-2015P

VFAS1-2022P

VFAS1-2037P

VFAS1-2055P

VFAS1-2075P

VFAS1-2110P

VFAS1-2150P

VFAS1-2185P

VFAS1-2200P

VFAS1-2300P

VFAS1-2370P

VFAS1-2450P

VFAS1-2550P

VFAS1-2750P

VFAS1-4007P

VFAS1-4015P

VFAS1-4022P

VFAS1-4037P

VFAS1-4055P

VFAS1-4075P

VFAS1-4110P

VFAS1-4150P

VFAS1-4185P

VFAS1-4220P

VFAS1-4300P

VFAS1-4370P

VFAS1-4450P

VFAS1-4550P

VFAS1-4750P

VFAS1-4900P

VFAS1-4110KP

VFAS1-4132KP

VFAS1-4160KP

VFAS1-4200KP

VFAS1-4220KP

VFAS1-4280KP

VFAS1-4355KP

VFAS1-4400KP

VFAS1-4500KP

108

109

110

111

112

113

114

115

116

E6581315

8.3.Utilizing panel (LEDs and keys) by communication

The VF-AS1 can display data that is not related to the inverters through an external controller or

other means. Input by key operations can also be executed. The use of inverter resources re-

duces the cost for the entire system.

8.3.1. LED setting by communication

Desired LED information can be displayed by communication.

Set the standard monitor display selection parameter to “communication LED setting

(=).”

When in the standard monitor mode status, LED information is displayed according to the setting of

Communication Number FA65. (Set to Communication Number FA65 = 1 and initial data “”

in shipment setting)

In case of an alarm while setting communication LEDs, the alarm display will alternately display

specified LED data and alarm message.

For example, if an over-current alarm (alarm display “”) occurs while “.” is displayed by this

function, “” and “.” will be displayed alternately.

Commu-

nication

Number.

FA65

Shipment

setting

Parameter Name

Range

Select display by communication

0: Numeric data (FA66, FA67, FA68)

1: ASCII data 1 (FA70, FA71, FA72, FA73,

FA74)

2: ASCII data 2 (FA75, FA76, FA77, FA78,

FA79)

FA66

FA67

Numeric display data

(Enabled if FA65=0)

Decimal point position

(Enabled if FA65=0)

0-9999

0: No decimal point (xxxx)

1: First digit below decimal point (xxx.x)

2: Second digit below decimal point (xx.xx)

0:Hz off, % off, 1:Hz on, % off

2:Hz off, % on, 3:Hz on, % on

0 – 127 (0 – 7FH)

FA68

FA70

LED data 0 for unit

(Enabled if FA65=0)

ASCII display data 1, first digit from

left

64H (’d’)

41H (’A’)

74H (’t’)

41H (’A’)

(See ASCII LED display code chart)

(Enabled if FA65=1)

ASCII display data 1, second digit

from left

(Enabled if FA65=1)

ASCII display data 1, third digit from

left

FA71

FA72

FA73

0 – 256 (0 – FFH)

(See ASCII LED display code chart)

0 – 256 (0 – FFH)

(See ASCII LED display code chart)

(Enabled if FA65=1)

ASCII display data 1, fourth digit from 0 – 127 (0 – 7FH)

left

(See ASCII LED display code chart)

(Enabled if FA65=1)

LED data 1 for unit

(Enabled if FA65=1)

ASCII display data 2, first digit from

left

FA74

FA75

0:Hz off, % off, 1:Hz on, % off

2:Hz off, % on, 3:Hz on, % on

0 – 127 (0 – 7FH)

30H (’0’)

(See ASCII LED display code chart)

(Enabled if FA65=2)

ASCII display data 2, second digit

from left

(Enabled if FA65=2)

ASCII display data 2, third digit from

left

(Enabled if FA65=2)

ASCII display data 2, fourth digit from 0 – 127 (0 – 7FH)

left

FA76

FA77

FA78

FA79

0 – 256 (0 – FFH)

(See ASCII LED display code chart)

30H (’0’)

0 – 256 (0 – FFH)

(See ASCII LED display code chart))

(See ASCII LED display code chart)

(Enabled if FA65=2)

LED data 2 for unit

(Enabled if FA65=2)

0:Hz off, % off, 1:Hz on, % off

2:Hz off, % on, 3:Hz on, % on

E6581315

„ Block Communication Function for LED Display

To display LED data for ASCII display that is synchronized to each digit, set data for each digit and

validate this set data by display selection by communication (Communication Number FA65).

Synchronization can also be achieved by batch writing LED data parameters after changing the fol-

lowing block communication mode parameters and by sending data by block communication.

Writing in the block communication function will be writing in the RAM only due to the EEPROM life

for write operations. The LED data will reset to the initial value ““ when the power is turned

off, in failure resetting or when standard shipment settings are set.

„

Parameter Setting

“Block communication mode (Communication Number FA80)”

Setting range: 0, 1 (Initial value 0)

0: Block communication parameters ( - ) is used

1: LED display ASCII data is used (When writing, ASCII display data 1 [Communication Num-

ber FA70 - FA74], when reading, LED data displayed before change)

*To validate LED data set by using LED display block communication, set standard monitor display

selection to “communication LED select ( = ) and display selection by communication

to “ASCII data 1 (Communication Number FA65).

„

Format

The format is the same as that used in the usual block communication mode. (For the detail infor-

mation, see “4.1.3 Block communication transmission format”) The block communication pa-

rameters ( - ) will become invalid. Write data will become ASCII display data 1

(Communication Number :FA70 - FA74) fixed. LED display data that is actually being output will be

read during reading. The specification range for write operations is 0 to 5.

„

Example

Communication LED selection ( = ) for standard monitor display selection.

ASCII data 1 (Communication Number:FA65 = 1) for display selection by communication.

LED display ASCII data (Communication Number: FA80 = 1) for the block communication mode.

Current LED display status is display of initial value “”

PC → Inverter: 2F580505003000310032003300035A・・・“” display command

Inverter → PC: 2F59050000640041007400410000E7 ・・・ “” displayed before change

E6581315

■ ASCII LED display data code (00H-1FH are blank.)

Hex Code Display Char. Hex Code

Display

BLANK

Char. Hex Code

Display

Char. Hex Code

Display

Char.

00H

01H

02H

03H

04H

05H

06H

07H

08H

09H

0AH

0BH

0CH

0DH

0EH

0FH

10H

11H

12H

13H

14H

15H

16H

17H

18H

19H

1AH

1BH

1CH

1DH

1EH

1FH

BLANK

20H

21H

22H

23H

24H

25H

26H

27H

28H

29H

2AH

2BH

2CH

2DH

2EH

2FH

30H

31HT

32H

33H

34H

35H

36H

37H

38H

39H

3AH

3BH

3CH

3DH

3EH

3FH

40H

41H

42H

43H

44H

45H

46H

47H

48H

49H

4AH

4BH

4CH

4DH

4EH

4FH

50H

51H

52H

53H

54H

55H

56H

57H

58H

59H

5AH

5BH

5CH

5DH

5EH

5FH

BLANK

60H

61H

62H

63H

64H

65H

66H

67H

68H

69H

6AH

6BH

6CH

6DH

6EH

6FH

70H

71H

72H

73H

74H

75H

76H

77H

78H

79H

7AH

7BH

7CH

7DH

7EH

7FH

BLANK

(

)

BLANK

DGP

[

DGP

{

BLANK

;

＼

]

}

BLANK

*Dots to show decimal points and other uses can be added by setting (80H) Bit 7 (highest bit).

Example: “0.” to display “60.0” can be added by “30H + 80H = B0H.”

E6581315

8.3.2.Key utilization by communication

The VF-AS1 can use the panel keys on the inverters through external communication.

„ Key Monitoring Procedure

Set panel key selection (Communication Number: FA10) to “1” to set the external key mode. How-

ever, if communication duration is less than 1sec to avoid an inverter operation shutdown in com-

munication disruption, communication must always be maintained, such as monitoring key data and

LED data to automatically reset inverter operations to inverter key operation (FA10 = 0). Set to the

external communication key mode (FA10 = 1) to disable the key function of the inverters so that in-

verter operation will not be affected by pressing of the keys on the inverters. By monitoring key in-

formation, which is input by the keys on the inverters in this condition, through inverter key data

(Communication Number; FC01), the keys on the inverters can be operated through a controller and

other devices.

* When the key mode is the external key mode, key operation as an inverter function is disabled and

the inverters cannot be stopped by pressing the STOP key to stop inverter operation. Enable

emergency stop through an external terminal or other device when an inverter stop is desired.

Panel Key Selection (Communication Number:FA10)

The panel key selection parameter (Communication Number; FA10) discriminates which keys are to be used, panel keys

on the inverters or keys sent by external communication, as panel keys used in panel processing of the inverters.

Communication No.：FC01

Panel key data of inverters

FA10=”0”

Communication No.：FC00

Key data for inverter

control panel processing

Communication No.：FA11

FA10=”1”

External communication

key data

Keys on inverters enabled (Communication Number; FA10 = 0):

Key data: Data of keys on inverters (Communication Number : FC01)

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

EASY

KPP

ENT

MODE

DOWN

STOP

RUN

“KPP” for Bit 7 indicates that panel keys are mounted on the inverters.

External keys enabled (Communication Number; FA10 = 1):

Key data: External key data (Communication Number: FA11)

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

EASY

ENT

MODE

DOWN

STOP

RUN

Key monitoring (Communication Number : FC00):

Information of the enabled keys on the inverters can be monitored.

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

KPP

EASY

ENT

MODE

DOWN

STOP

RUN

“KPP” for Bit 7 indicates that panel keys are enabled on the inverters.

E6581315

9.Parameter data

Explanation of parameters for VF-AS1 series is described here. For communication purposes, see

the parameter list on inverter's instruction manual regarding the communication number, adjustment

range and so forth.

„ Referring to the parameter list

Minimum set-

ting unit

Refer-

ence

Communi-

Default

setting

Write during

running

Title

Function

Adjustment range

(Panel/Communi

cation)

cation No.

auh

au1

History function

1/1

5.1

5.2

0000

Automatic accelera- 0:Deselect

Disabled

tion/deceleration

1:Automatic setting

2:Automatic setting (during

acceleration only)

0:Deselect

1:Automatic torque boost +

auto-tuning 1

au2

acc

0001

Automatic torque

boost

1/1

Disabled

Enabled

5.3

5.2

：

Acceleration time

0.1~6000 sec.

0.1/0.1 *2

0009

0007

0: -

1:50 Hz default setting

2:60 Hz default setting

3:Factory default setting

：

10:Acceleration/deceleration

time setting 0.01

sec.~600.0 sec.

Factory default

setting

typ

1/1

5.20

Disabled

11:Acceleration/deceleration

time setting 0.1

sec.~6000sec.

　　　　　　　　　　　　　　　　　　　　　　　：

　*1: Default values vary depending on the capacity.

　*2: Changing the parameter  enables to set to 0.01 sec. (adjustment range: 0.01~600.0 sec.).

- The summary of parameter list relating to the communication is as follows.

(1) “Title” means the display on the inverter panel.

(2) “Communication number” is affixed to each parameter that is necessary for designating the parameter for com-

munication.

(3) "Adjustment range" means a data range adjustable for a parameter, and the data cannot be written outside the

range. The data have been expressed in the decimal notation. For writing the data through the communication

function, take the minimum setting unit into consideration, and use hexadecimal system.

(4) "Minimum setup unit" is the unit of a single data (when the minimum unit is "-", 1 is equal to 1).

For example, the "minimum setup unit" of acceleration time () is 0.01, and 1 is equal to 0.01s. For setting a

data to 10 seconds, transmit 03E8h [10÷0.01=1000d=03E8h] by communication.

(5) If FA09 is set to 0, the acceleration/deceleration time parameters acc, dec, f500, f501, f510,

f511, f514, and f515can be set in units of 0.01 sec.

Q　Acceleration/deceleration setting time unit (FA09)

Communication No.

FA09

Function name

Unit

Adjustment range

0: 0.01 sec. (0.01-600.0)

1: 0.1 sec. (0.1-6000.0)

Acceleration/deceleration time unit

－

E6581315

„

Command parameters

For those parameters that contain data only in the RAM and not in the EEPROM, their data return to

initial values when the power is turned off, in failure resetting, or when standard shipment settings

are set. Note that parameters without data storage in the EEPROMs will be written in the RAM only

even if the command W (writing in EEPROMs and RAM) is executed.

Q　Commands 　　　　　　　　　　　　　　　　　　　　　　　　　NOTE : Data is expressed in decimal notation.

Communica-

Min.

Setting

Unit

Write

During

Operation

tion

Num-

ber.(HEX)

Adjustment Range

Initial

Value

EEP

ROM

Function

Command 1 (2-wire RS485)^＊

－

FA00

0 to 65535

yes None

FA01 Frequency command value (2- 0 to Max. frequency 0.01Hz

yes None

wire RS485)^＊

()

FA03 Operation panel operation

Low-limit frequency 0.01Hz

() to High-limit

yes Available

frequency *²

frequency ()

0 to 65535

Command 1 (4-wire RS485)^＊

FA04

－

yes None

FA05 Frequency command value (4- 0 to Max. frequency 0.01Hz

wire RS485)^＊

()

Panel key selection^＊

－

FA10

0: Main unit

1: Comunication

0 to 65535

yes None

FA11 External communication key

data^＊

＊

FA20

FA22

0 to 65535

yes None

Command 2 (2-wire RS485)

Command 2 (4-wire RS485)

FA30 Torque command value (2-wire -250.00 to 250.00

RS485)

－

0.01%

FA32 Torque command value (4-wire -250.00 to 250.00

0.01%

yes None

RS485)

Terminal output data^＊

FM analog output data^＊

FA50

FA51

0 to 255

yes None

0 to 2047

(11-bit resolution)

0 to 2047

(11-bit resolution)

0 to 2047

(11-bit resolution)

0 to 2047

(11-bit resolution)

AM analog output data^＊

MON1 analog output data^＊

MON2 analog output data^＊

FA52

FA53

FA54

yes None

yes Available

FA65 Select display by communica- 0 to 2

－

tion^＊

Numerical display data^＊

FA66

FA67

FA68

0-9999

0 to 2

yes Available

Decimal point position^＊

－

LED data for unit 0^＊

0 to 3

FA70 ASCII display data 1

0 to 127

100

(‘d’)

First digit from left^＊

FA71 ASCII display data 1

Second digit from left^＊

0 to 255

0 to 127

(‘A’)

yes Available

－

FA72 ASCII display data 1

116

(‘t’)

Third digit from left^＊

FA73 ASCII display data 1

(‘A’)

Fourth digit from left^＊

LED data for unit1^＊

－

FA74

0 to 3

yes Available

FA75 ASCII display data 2

0 to 127

(‘0’)

First digit from left^＊

FA76 ASCII display data 2

Second digit from left^＊

0 to 255

0 to 127

(‘0’)

yes Available

－

FA77 ASCII display data 2

(‘0’)

Third digit from left^＊

FA78 ASCII display data 2

(‘0’)

Fourth digit from left^＊

LED data for unit 2^＊

－

FA79

0 to 3

0 to 1

yes Available

Block communication mode^＊

FA80

E6581315

¹: Enable the communication command or communication frequency setting before setting these

＊

parameters are set. Otherwise, the parameters will not function. See “8.1 Command by

communication” for the method to enable them.

²: Note that the Communication Number for operation panel operation frequency is FA02 in the

VF-S7 and VF-S9 series.

³: See “8.1 Communication commands (commande from the computer)” for the detail information.

⁴: See “8.3 Utilizing panel (LEDs and keys) by communication” for the detail information.

＊

E6581315

„ Monitor parameters

*These Parameters are read-only (monitor-only) parameters.

Communication No.

Function

Unit

Remarks

Current

value

Trip data held

FC00

－

Monitor of key data (Effective

data)

－

Refer to Section

8.3.

FC01

FC90

FC91

FD00

FD01

FD02

FD03

FD04

FD05

FD06

FD07

－

Monitor of inverter keypad data

Trip code

－

Alarm code

－

Refer to Section

8.2.

FE00

FE01

FE02

FE03

FE04

FE05

FE06

FE07

FE08

FE10

FE11

FE12

FE13

FE14

FE15

FE16

FE17

FE18

FE19

FE20

FE21

FE22

FE23

FE24

Output frequency

Inverter status 1

0.01Hz

－

Frequency command value

Output current

0.01Hz

0.01%

－

Input voltage (DC detection)

Output voltage

Input terminal information

Output terminal information

CPU version 1 (application)

Past trip 1 (latest)

Past trip 2

Refer to Section

8.2.

－

Refer to Section

8.2.

－

Past trip 3

－

Past trip 4 (earliest)

Cumulative operation time

Compensated frequency

Speed feedback (real time)

Speed feedback (1-sec. filter)

Torque

－

FD15

FD16

FD17

FD18

FD19

FD20

FD21

FD22

FD23

FD24

0.01Hz

0.01%

0.01Hz

0.01%

Torque command

Torque current

Exciting current

PID feedback value

Motor overload factor (OL2 data)

Inverter overload factor (OL1

data)

0.01%

FD25

FE25

Regenerative braking resistance

overload factor (OLr data)

Motor load factor

FD26

FD27

FD28

FE26

FE27

FE28

Inverter load factor

Regenerative braking resistance

load factor

FD29

FD30

－

FE29

FE30

FE35

FE36

FE37

FE38

FE39

FE42

Input power

0.01kW

0.01%

Output power

RR/S4 input

－

VI/II input

Refer to Section

8.2.

－

RX input

－

Option AI1

－

Option AI2

FD42

Inverter status 2

Refer to Section

8.2.

－

FE43

FE44

FE45

FE46

FE48

FE49

MON1 output (analog option 1)

MON2 output (analog option 2)

Command mode status

Frequency setting mode status

PID command

－

FD45

FD46

FD48

FD49

－

Refer to Section

8.2.

－

0.01Hz

Inverter status 3

Refer to Section

8.2.

－

E6581315

FD50

FD51

－

Light-load high-speed torque 1

Light-load high-speed torque 2

MY monitor 1

0.01%

－

FE60

FE61

FE62

FE63

FE70

FE71

FE73

FE76

FE77

FE79

－

MY monitor 2

－

MY monitor 3

－

MY monitor 4

－

Rated current

0.1a

0.1V

－

Rated voltage

－

CPU version 2 (motor)

Integral input power

Integral output power

Part replacement alarm informa-

tion

－

0.01kWh

－

Refer to Section

8.2.

－

FE80

FE84

Cumulative power ON time

Binary input value (option)

－

FD84

E6581315

Appendix 1 Table of data codes

• JIS (ASCII) codes

Higher orde

Lower order

NUL

TC₇(DLE)

DC₁

(SP)

０

１

２

３

４

５

６

７

８

９

：

；

＜

＝

＞

？

＠

Ａ

Ｂ

Ｃ

Ｄ

Ｅ

Ｆ

Ｇ

Ｈ

Ｉ

Ｊ

Ｋ

Ｌ

Ｍ

Ｎ

Ｏ

Ｐ

Ｑ

Ｒ

Ｓ

Ｔ

Ｕ

Ｖ

Ｗ

Ｘ

Ｙ

Ｚ

［

￥

］

＾

＿

、

ａ

ｂ

ｃ

ｄ

ｅ

ｆ

ｇ

ｈ

ｉ

ｊ

ｋ

ｌ

ｍ

ｎ

ｏ

ｐ

ｑ

ｒ

ｓ

ｔ

ｕ

ｖ

ｗ

ｘ

ｙ

ｚ

｛

｜

｝

‾

TC₁(SOH)

TC₂(STX)

TC₃(ETX)

TC₄(EOT)

TC₅(ENQ)

TC₆(ACK)

BEL

DC₂

”

＃

＄

％

＆

’

（

）

＊

＋

，

－

．

／

DC₃

DC₄

TC₈(NAK)

TC₉(SYN)

TC₁₀(ETB)

CAN

FE₀(BS)

FE₁(HT)

FE₂(LF)

FE₃(VT)

FE₄(FF)

FE₅(CR)

SUB

ESC

IS₄(FS)

IS₃(GS)

IS₂(RS)

IS₁(US)

DEL

CR: Carriage return

Ex.: Code 41 = Character A

E6581315

Appendix 2 Response time

The communication response time can be calculated from data communication time and inverter

processing time. When wishing to know the communication response time, calculate using the

following as a reference

Interval corresponding to 3.5 bytes

Data processing time of inverter (Approx. 8 ms)

Data transmission time

PC → Inverter

Inverter → PC

Response time

„

Data transmission time

Data transmission time =

×number of bytes transmitted×number of bits

baudrate

* Number of bits = start bit + data frame length + parity bit + stop bit

* Minimum number of bits = 1 + 8 + 0 + 1 = 10 bits

* Maximum number of bits = 1 + 8 + 1 + 2 = 12 bits

Data transmission time =

×8×11= 4.6ms

19200

„

Data processing time of inverter

Data processing time: maximum 8 ms

E6581315

Appendix 3 Compatibility with the communication function

of the VF-A7

To provide consistency in communication procedures, the communication function of the VF-AS1

series of inverters has been designed based on the protocols used for the Toshiba VF-A7 series of

inverters. With regard to compatibility, however, VF-A7 users should check the items described be-

low before using the communication function of their inverters.

„ To VF-AS1 inverter users:

Some parameters of the VF-A7 are different from those of the VF-AS1 in function or adjustment

range (upper and lower limits), even though they have the same title or the same communication

number. So, when accessing a parameter, consult the VF- A7 inverter’s instruction manual to see if

the parameter is identical to the corresponding parameter of the VF-AS1. If the parameter differs,

modify the computer program to suit your inverter. To avoid hazards, never copy parameters from

one model of inverter to another.

„ Comparison of communication-related items

The table below gives a comparison of communication-related items to be kept in mind when re-

placing VF-A7 inverters with VF-AS1 inverters or when connecting VF-A7 inverters and VF-AS1 in-

verters to the same network. It does not cover any items common to the VF-A7 and VF-AS1 series

of inverters.

Model

VF-A7 series

VF-AS1 series

Reference

Refer to

Item

32-bit mode

For some parameters, including accel-

eration/deceleration time parameters,

data communication are carried out in

32-bit mode.

32-bit mode is not available. For all

parameters, access is made in 16-bit Section 9.

mode.

Handling of negative

data specified with pa-

rameters

Access is made in 32-bit mode.

Access is made in 16-bit mode. To

see if the value specified with a

parameter is signed or not, check the

adjustment range of the parameter.

No frame can be divided into smaller

frames. Do not place an interval cor-

responding to less than 1.5 bytes of

data between frames to be sent.

0.1 sec.

－

Division of a frame

A frame can be sent with it divided into

smaller frames if all the frames can be

sent within approx. 0.5 sec.

Refer to

Section

3.1.

Communication time-

out period (guide)

0.5 sec.

Receipt information in

front of the start code

Even if there is receipt information in

front of the start code of a frame re-

ceived, the frame is assumed to begin

with the start code.

A frame must always begin with a start

code, otherwise it will be rejected.

Reset command

RS485 baud rate

When an inverter receives a reset com- When an inverter receives a reset

mand, it sends back a response before it command, it sends back no response.

is reset.

Refer to

Section

8.1.

Refer to

Section

7.1.

1200 to 38400 bps

9600 to 38400 bps

Notice

♦ Do not use communication programs written for another series of inverters.

Even though parameters have the same title and the same communication number, they may be different

in function. When using a parameter, always check its specifications in the instruction manual for your

inverter. If the specifications of the parameter differ, modify the computer program to suit your inverter.

♦ To avoid hazards, do not copy parameters from one model of inverter to another.

Even though parameters have the same titles and communication numbers, they may be different in

function.

E6581315

Appendix 4 Troubleshooting

If a problem arises, diagnose it in accordance with the following table before making a service call. If

the problem cannot be solved by any remedy described in the table or if no remedy to the problem is

specified in the table, contact your Toshiba dealer.

Problem

Remedies

Reference

Communication will not take - Are both the computer and the inverter turned on?

place.

- Are all cables connected correctly and securely?

- Are the same baud rate, parity and bit length set for every unit on the

network?

Chapter 7

Section 4.1

Section 5.1

Chapter 9

Inverter

instruction

manual

An error code is returned.

- Is the data transmission format correct?

- Does the data written fall within the specified range?

- Some parameters cannot be written during inverter operation.

Changing should be attempted when the inverter is in halt.

The trip err5 and alarm t - Check the cable connection and the timer setting.

Section 7.3

occur.

Frequency instructions from the - Is the frequency setting mode selection parameter set to “computer”? Section 8.1

computer have no effect.

Commands, including the run and - Is the command mode selection parameter set to “computer”?

Section 8.1

stop commands, from the com-

muter have no effect.

- Isthe inverter connected correctly?

- Are you sure the receive line and the send line are not in contact with

each other?

During RS485 communication,

an inverter sends back respons-

es repeatedly an infinite number

of times.

Refer

Appendix

A change to a parameter does Some communication-related parameters do not take effect until the

Chapter 7

not take effect.

inverter is reset. To make them take effect, turn the inverter off tempo-

rarily, then turn it back on.

The setting of a parameter was When using the TOSHIBA Inverter Protocol, use the W command to Section 4.2

changed, but it returns to its write data into the EEPROM. If you use the P command that writes data

original setting when the inverter into the RAM only, the data will be cleared when the inverters are reset.

is turned off.

E6581315

Appendix 5 Connecting for RS485 communication

„ Connector diagram for 2-wire RS485 communication

Pin-8

Pin-1

Signal name

RXD+/TXD+

RXD-/TXD-

FWE

Pin number

Description

Same phase reception data (positive line)

Anti-phase reception data (negative line)

FEW (Do not connect the cable.)

Ground line of signal data

(3)

PRG(TX)

PRG(RX)

P11

PRG (Do not connect the cable.)

11V (Do not connect the cable.)

„ Connecting diagram for 2-wire RS485 communication

* Never use pin-7 (P11).

Straight

Slave

Master

Slave

CN1

RXD+/TXD+

RXD-/TXD-

RXD+/TXD+

RXD-/TXD-

RXD+/TXD+

RXD-/TXD-

RXD+/TXD+

RXD-/TXD-

Pin-4

Pin-5

Pin-8

(Pin-3)

Terminating resistance

120Ω-1/2W

E6581315

„ Connector diagram for 4-wire RS485 communication

Pin-8

Pin-1

Signal name

RXA

Pin number

Description

Same phase reception data (positive line)

RXB

TXA

TXB

Anti-phase reception data (negative line)

Same phase transmitting data (positive line)

Anti-phase transmitting data (negative line)

Ground line of signal data

(2)

－

Open (Do not connect the cable.)

11V (Do not connect the cable.)

P11

*This table shows signal line of inverter side. (Example: RXA signal is received by

inverter.)

„ Connecting diagram for 4-wire RS485 communication

Straight

Cross

Straight

Slave

Master

Slave

CN1

Pin-4

RXA

RXB

TXA

TXB

RXA

RXB

TXA

TXB

RXA

RXB

TXA

TXB

RXA

RXB

TXA

TXB

Pin-5

Pin-3

Pin-6

Pin-8

(

Pin-2)

Terminating resistance

120Ω-1/2W

* When using 2-wire type, short RXB to TXB and RXA to TXA.

* Never use pin-1 (Open) and pin-7 (P11).

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