Toshiba TOSVERT VF-AS3 User manual

E6582143
Safety precautions
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Communication
function overview
1
Transmission
specifications
2
RS485 communication
wiring diagram
3
Selecting
communication protocol
4
TOSHIBA
inverter protocol
5
MODBUS-RTU
protocol
6
Inverter-to-inverter
communication ([F806]
or [F826])
7
Communication-
related parameters
8
Control through
communication
9
Parameter data
10
<Appendix 1> Data
code table
A1
<Appendix 2>
Response time
A2
<Appendix 3> Inverter
type (FB05)
A3
<Appendix 4>
Troubleshooting
A4
15
16
17
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RS485 Communication Function
Instruction Manual
Attention
1. Make sure that this instruction manual is received by those who actually uses the
RS485 communication function.
2. Read this manual thoroughly before using the RS485 communication function. After
reading this manual, keep it in a safe place for future maintenance and inspection.
3. The information in this manual is subject to change without prior notice.

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The items described in the instruction manual and on the inverter itself are very important so that
you can use safely the inverter, prevent injury to yourself and other people around you as well as to
prevent damage to property in the area.
Thoroughly familiarize yourself with the safety precautions in the inverter instruction manual
(E6582062) and then continue to read the manual. Make sure that you observe all warnings given.
Description of display
Meaning of symbols
ISafety precautions
Display Meaning
WARNING
Indicates that "improper use may result in death or serious injury."
CAUTION
Indicates that "improper use may result in injury or only property damage."*1*2
*1 Injury means injury, burn, electric shock, etc. that do not require hospitalization or long-term hospital visits for treatment.
*2 Property damage means extended damage related to damage to the properties and materials.
Display Meaning
Mark
Indicates prohibition (matters prohibited).
The concrete contents are indicated inside or near the symbol with a picture or text.
Mark
Indicates instructions (matters to be observed without fail).
The concrete contents are indicated inside or near the symbol with a picture or text.
Mark
Indicates a warning or caution.
The concrete contents are indicated inside or near the symbol with a picture or text.

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CAUTION Reference page
Prohibited
• Do not connect Ethernet to the RS485 communication connector.
This can result in malfunction.
• Do not connect or disconnect the communication cable when power is
ON.
This can result in malfunction.
-> Refer to
[Chapter 3]
Mandatory
action
• The number of times of writing a parameter to EEPROM must be 100,000
or less.
EEPROM has a life that expires with writing of approx. 100000 times.
Command parameters (some exceptions -> Refer to Command
parameters in [10.Parameter data]) have only RAM but no EEPROM, so
there is no limit to the number of writing times.
When TOSHIBA inverter protocol is used and if there is no need to store
data, you can write only to RAM (using a P command).
• Set the parameter of communication time-out.
The devices cannot be stopped when a communication error occurs.
-> Refer to [5. 2
Transmission
command]
-> Refer to
[Chapter 5]
-> Refer to
[Chapter 6]

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Contents
1 Communication function overview .......................................................................................................................... 1-1
2 Transmission specifications .................................................................................................................................... 2-1
3 RS485 communication wiring diagram ................................................................................................................... 3-1
4 Selecting communication protocol .......................................................................................................................... 4-1
4. 1 Reception frame completion process ............................................................................................................. 4-1
5 TOSHIBA inverter protocol ..................................................................................................................................... 5-1
5. 1 TOSHIBA inverter protocol transmission format ............................................................................................. 5-2
5. 1. 1 ASCII mode transmission format ...................................................................................................... 5-2
5. 1. 2 Binary mode transmission format ..................................................................................................... 5-5
5. 1. 3 Block communication transmission format ....................................................................................... 5-8
5. 2 Transmission command ................................................................................................................................ 5-13
5. 3 Transmission error ........................................................................................................................................ 5-16
5. 4 Broadcast communication function ............................................................................................................... 5-17
5. 5 Usage examples ........................................................................................................................................... 5-19
6 MODBUS-RTU protocol .......................................................................................................................................... 6-1
6. 1 MODBUS-RTU transmission format ............................................................................................................... 6-2
6. 1. 1 One word reading command (03H) .................................................................................................. 6-3
6. 1. 2 Block reading command: Indirect reading (03H) .............................................................................. 6-4
6. 1. 3 Block reading command: Direct reading (03H) ................................................................................. 6-7
6. 1. 4 Word writing command (06H/10H) ................................................................................................... 6-9
6. 1. 5 Block writing command: Indirect writing (10H) ............................................................................... 6-11
6. 1. 6 Block writing and reading command: Indirect writing and reading (17H) ....................................... 6-13
6. 1. 7 Model information reading command (2BH) ................................................................................... 6-16
6. 2 CRC calculation ............................................................................................................................................ 6-18
6. 3 Error code ..................................................................................................................................................... 6-19
7 Inverter-to-inverter communication ([F806] or [F826]) ............................................................................................ 7-1
7. 1 Speed proportional control ([F810] to [F814]) ................................................................................................. 7-5
7. 2 Transmission format of inverter-to-inverter communication (reference) ......................................................... 7-8
8 Communication-related parameters ....................................................................................................................... 8-1
8. 1 Baud rate ([F800] or [F820]), Parity bit ([F801] or [F821]) .............................................................................. 8-5
8. 2 Inverter number ([F802]) ................................................................................................................................. 8-5
8. 3 Communication time-out detection function ([F803], [F804], [F808], or [F823], [F824], [F828]) ..................... 8-6
8. 4 Transmission wait time ([F805] or [F825]) ...................................................................................................... 8-7
8. 5 Free memorandum ([F880]) ............................................................................................................................ 8-8
8. 6 Parameter writing ([F897]) .............................................................................................................................. 8-8
8. 7 Communication option reset ([F899]) ............................................................................................................. 8-8
9 Control through communication .............................................................................................................................. 9-1
9. 1 Command through communication ................................................................................................................. 9-1
9. 2 Monitor through communication ..................................................................................................................... 9-9
9. 3 Using the panel (LED, keys) through communication ................................................................................... 9-22
9. 3. 1 LED settings through communication ............................................................................................. 9-22

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10 Parameter data ..................................................................................................................................................... 10-1
A1 <Appendix 1> Data code table ............................................................................................................................ A1-1
A2 <Appendix 2> Response time .............................................................................................................................. A2-1
A3 <Appendix 3> Inverter type (FB05) ...................................................................................................................... A3-1
A4 <Appendix 4> Troubleshooting ............................................................................................................................ A4-1

VF-AS3 1. Communication function overview
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This instruction manual describes an RS485 communication interface embedded in TOSVERT VF-
AS3.
A: Standard function RS485 communication connector 1 using a 2-wire RS485 communication port
(The operation panel is mounted by default.)
B: Standard function RS485 communication connector 2 using a 2-wire/4-wire RS485 communication
port
(A 2-wire port can be used with the default setting.)
In VF-AS3, you can use the computer link function to carry out data communication between the
controller (hereinafter referred to as computer) and the inverter by connecting the optional USB
communication conversion unit (USB001Z).
Available communication protocols are TOSHIBA inverter protocol and MODBUS-RTU protocol. You
can set which protocol to use in [F807: RS485 (1) protocol] or [F827: RS485 (2) protocol].-> Refer to [4.
Selecting communication protocol]
1Communication function overview
CAUTION
Prohibited
• Do not connect Ethernet to the RS485 communication connector.
This can result in malfunction.
A
B
RS485 communication
connector 1
RS485 communication
connector 2 (RS485COM2)

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1. Communication function overview VF-AS3
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<Computer link function>
Regardless of using TOSHIBA inverter protocol or MODBUS-RTU protocol, you can pass on the
following information to the computer by creating a program according to the procedures described
later.
(1) Monitoring inverter status (such as the output frequency, current, and voltage)
(2) Sending Run/Stop and other control commands to the inverter
(3) Reading and writing inverter parameter settings
Supported communication codes are JIS (ASCII) code and Binary (HEX) code. It is assumed that JIS
(ASCII) code is used to communicate with a computer, such as a PC, and Binary (HEX) code is used to
communicate with a microcomputer, such as a control instrument. Data is accessed with a
communication number.
* A bit is the minimum unit of information used in computers and expressed by 0 or 1. A group of 16
bits is called a word. In VF-AS3 communication function, this word unit is basically used to describe
the amount of data. A word can handle data of 0 to FFFFH in hexadecimal format (0 to 65535 in
decimal format).
BIT15 BIT8 BIT7 BIT0
1 bit
1 word

VF-AS3 2. Transmission specifications
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Bold font indicates the default setting.
When received by inverter: 11 bits (1 start + 8 bits + parity + 1 stop)
The inverter receives with 1 stop bit.
(The computer can send with 1, 1.5, or 2 stop bit.)
When sent by inverter: 12 bits (1 start + 8 bits + parity + 2 stop)
The inverter sends with 2 stop bit.
(The computer can receive with 1, 1.5, or 2 stop bit.)
2Transmission specifications
Item Specifications
Transmission scheme Half duplex
Synchronization
scheme Start-stop synchronization
Communication baud
rate 9600/19200/38400 (Parameter setting)*1
*1 After changing the baud rate setting or communication parity setting, turn off or reset the inverter to reflect the setting.
Communication
protocol TOSHIBA inverter protocol/MODBUS-RTU (Parameter setting)*1
Character
transmission
<ASCII mode> JIS X0201 8-bit (ASCII)
<Binary mode, MODBUS-RTU> Binary codes fixed to 8 bits
Stop bit length Received by inverter: 1bit/Sent by inverter: 2 bits*3
Error detecting
scheme
Parity: *2 Even/Odd/Non parity (selectable using a parameter)*1,
Checksum (TOSHIBA inverter protocol), CRC (MODBUS-RTU)
*2 All messages transmitted in ASCII mode have a vertical parity bit (even) defined in JIS-X-5001 added by using Roman 8-bit codes
compliant with JIS-X-0201 (ANSI). In the parameter setting, you can change it to an odd parity (reflected after reset).
Character
transmission format 11-bit characters*3 (Stop bit =1, with parity)
*3 Character transmission is as follows.
Order of bit
transmission format LSB first
Frame length Variable
START
BIT BIT0 BIT1 BIT2 BIT3 BIT4 BIT5 BIT6 BIT7 BIT BIT
PARITY STOP
START
BIT BIT0 BIT1 BIT2 BIT3 BIT4 BIT5 BIT6 BIT7 BIT BIT BIT
PARITY STOP STOP