Toshiba TOSVERT VF-AS3 User manual

E6582143
Safety precautions
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II
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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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. VF-AS3
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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)

E6582143
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

VF-AS3 3. RS485 communication wiring diagram
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■RS485 communication connector 1
3RS485 communication wiring
diagram
CAUTION
Prohibited
• Do not connect Ethernet to the RS485 communication connector.
Incorrect wiring can result in malfunction.
Signal name Pin arrangement Description
RXA+/TXA+ 4 Non-inverting transmitted and received data
RXB-/TXB- 5 Inverting transmitted and received data
SG 8
(3) Signal ground
- 1, 2, 6 - (connection prohibited)
- 7 Power (connection prohibited)
1 pin 8 pin
RS485 communication
connector 1

E6582143
3. RS485 communication wiring diagram VF-AS3
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A5
■Wiring example
* Do not connect the 7 pin (power).
Important
• Be sure to use the pull-up/pull-down resistor and line terminations resistors.
Master
RXA+/TXA+
RXB-/TXB-
SG
CN1
510
120
Straight Straight Straight
Slave
RXA+/TXA+
RXB-/TXB-
SG
Slave
RXA+/TXA+
RXB-/TXB-
SG
Slave
RXA+/TXA+
RXB-/TXB-
SG
P5
510
120
Pull-up/pull-down resistor
510 Ω - 1/2 W
4 pin
5 pin
8 pin
(3 pin) Line terminations resistor
120 Ω - 1/2 W

E6582143
VF-AS3 3. RS485 communication wiring diagram
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■RS485 communication connector 2
Signal wires seen from the inverter.
Signal name
Pin
arrangement Description2-wire 4-wire
[F829] = "0" [F829] = "1"
RXA+/TXA+
4
Non-inverting transmitted and received data
RXA Non-inverting received data
RXB-/TXB-
5
Inverting transmitted and received data
RXB Inverting received data
- TXA 3 Non-inverting transmitted data
- TXB 6 Inverting transmitted data
SG 8 Signal ground
- 1, 2 Open (connection prohibited)
- 7 Power (connection prohibited)
8 pin 1 pin
RS485 communication
connector 2 (RS485COM2)

E6582143
3. RS485 communication wiring diagram VF-AS3
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■Wiring example for 2-wire
Cautions for wiring
- To use RS485 in 2-wire, set [F829: RS485 (2) wiring type] to "0: 2-wire."
- Do not connect the 7 pin (power).
■Wiring example for 4-wire
Cautions for wiring
- To use RS485 in 4-wire, set [F829: RS485 (2) wiring type] to "1: 4-wire."
- Do not connect the 1 and 2 pins (open) and 7 pin (power).
- Do not bundle the communication cables and the main circuit wiring but keep a distance of 20 cm
or more.
- In the twisted pair cables, twist RXA and RXB, and TXA and TXB.
- Connect line terminations resistors at both terminals of whole serial bus.
- When using in inverter-to-inverter communication, the leader side receipt (4.5 pin)/follower side
(3.6 pin) line does not need to be connected.
Important
• Be sure to use the pull-up/pull-down resistor and line terminations resistors.
Master
RXA+/TXA+
RXB-/TXB-
SG
CN2
510
120
Straight Straight Straight
Slave
RXA+/TXA+
RXB-/TXB-
SG
Slave
RXA+/TXA+
RXB-/TXB-
SG
Slave
RXA+/TXA+
RXB-/TXB-
SG
P5
510
120
4 pin
5 pin
8 pin
Pull-up/pull-down resistor
120, 510 Ω - 1/2 W
Line terminations resistor
120 Ω - 1/2 W
Slave Slave Slave
Master
RXA
RXB
TXA
TXB
SG
RXA
RXB
TXA
TXB
SG
RXA
RXB
TXA
TXB
SG
RXA
RXB
TXA
TXB
SG
Cross Straight Straight
4 pin
5 pin
3 pin
6 pin
8 pin
510
120
P5
510
510
120
510
120
120
CN2
Pull-up/pull-down resistor
120, 510 Ω - 1/2 W
Line terminations resistor
120 Ω - 1/2 W

E6582143
VF-AS3 3. RS485 communication wiring diagram
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■Recommended parts
Recommended cable : Balanced twisted pair cable with the minimum conductor size of
AWG24 (0.22 mm2) and a characteristic impedance of 100 to 120Ω
Recommended connector : RJ45 modular plug

VF-AS3 4. Selecting communication protocol
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Supported communication protocols are TOSHIBA inverter protocol and part of MODBUS-RTU
protocol.
Select the protocol in [F807: RS485 (1) protocol] or [F827: RS485 (2) protocol].
- The parameter change is reflected after reset, such as power-off.
To transmit/receive frame data, the frame synchronization scheme, where the start and end of a frame are
recognized, is defined with dataless time (blank time of 3.5 bytes).
After starting receiving, if data communication is not carried out in the current communication baud rate for
a time of 3.5 bytes or more (9600 bps: Approx. 4 ms or more, 19200: Approx. 2 ms or more, 38400 bps:
Approx. 1 ms or more), the reception is judged to be complete, and the frame information is analyzed. For
this reason, the frame transmission interval must be 3.5 bytes or more.
When continuously controlling multiple inverters on the same line individually, all inverters on the same line
receive not only transmission frames from the computer to the inverter but also reply frames from the
inverter to the computer. In this case, transmission from the computer to the next inverter requires a blank
time of 3.5 bytes or more after receiving a replay frame. Otherwise, a reply frame + a transmission frame
are analyzed as one frame, resulting in abnormal communication.
4Selecting communication protocol
Title Communication
No. Parameter name Adjustment range Default setting
F807 0807 RS485 (1) protocol 0: TOSHIBA
1: MODBUS
0
F827 0827 RS485 (2) protocol 0
4. 1 Reception frame completion process
Frame A Frame B
[Normal]
3.5 bytes
or more
3.5 bytes
or more
Frame A
(1/2)
[Abnormal] Frame A, which is divided for transmission, cannot be received correctly when it has a blank
of 3.5 bytes or more.
Frame A
(2/2)
Frame B
Note) If the inverter is analyzing
Frame A, Frame B cannot
be received.

VF-AS3 5. TOSHIBA inverter protocol
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Set [F807: RS485 (1) protocol] or [F827: RS485 (2) protocol] to "0: TOSHIBA." In the default setting,
both [F807] and [F827] are set to "0: TOSHIBA."-> Refer to [4. Selecting communication protocol]
■Data exchange with the inverter
The inverter is always waiting for receiving data and responds to requests from the computer.
The header code automatically determines ASCII mode or Binary mode.
1 If the transmission format or inverter number is mismatched, the inverter causes a transmission
error and does not respond.
2 When the inverter number is added, communication is available only in broadcast
communication or if the inverter number is matched. If the inverter number is mismatched, the
inverter does not respond.
3 If [F803: RS485 (1) time-out time] or [F823: RS485 (2) time-out time] is set, a communication
time-out occurs when normal communication does not start within the set time. Set the inverter
operation when a communication timeout occurs in [F804: RS485 (1) time-out operation] or
[F824: RS485 (2) time-out operation] and the detection condition in [F808: RS485 (1) time-out
detection] or [F828: RS485 (2) time-out detection].-> Refer to [8. 3]
4 The inverter processes a received command and then returns data to the computer.
Details of the response time -> Refer to [A2. <Appendix 2> Response time]
5TOSHIBA inverter protocol
CAUTION
Mandatory
action
• Set the parameter of communication time-out
The devices cannot be stopped when a communication error occurs.
Header code "CR" (Carriage return)
ASCII mode "(" Required
Binary mode "2FH(/)" Not required
Important
• Communication is not possible for approx. two seconds after the power of the inverter body is
turned on until the initial setting is completed. If the control power goes off due to momentary
power failure, communication becomes temporarily unavailable.

E6582143
5. TOSHIBA inverter protocol VF-AS3
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5. 1. 1 ASCII mode transmission format
Specify data with a communication number, and describe the data format in hexadecimal and character
transmission with JIS-X-0201 (ASCII (ANSI)).
■Computer -> inverter
1. "(" (1 byte) : ASCII mode header code
2. INV-NO (2 bytes) : Inverter number (omittable for one-to-one communication)...
00 (30H, 30H) to 99 (39H, 39H), * (2AH)
A command is executed only when it matches the inverter number in
the parameter setting.
(When "*" is specified in broadcast communication, if the number
without "*" is matched, it is judged to be matched. If both of two digits
are "*", all connected inverters are judged to be matched.)
If the inverter number is mismatched or has one-digit, it is invalid, and
data is not returned.
3. CMD (1 byte) : Command (-> Refer to "Command and data details" shown below)
4. Communication number (4 bytes): Communication number -> Refer to [10. Parameter data]
5. DATA (0 to 4 bytes) : Write data (only available for W and P commands)
6. "&" (1 byte) : Checksum discrimination code (omittable) If the code is omitted, omit the
checksum as well.
7. SUM (2 bytes) : Checksum (omittable)
Add an ASCII coded number of the last two digits (4 bits/digit) of a total
sum (sum of ASCII codes) ranging from the header code to the checksum
discrimination code.
Example: (R0000&??)CR
28H + 52H + 30H + 30H + 30H + 30H + 26H = 160H
The checksum is the last two digits (??) = 60
If the checksum is omitted, omit the checksum discrimination code as well.
8. ")" (1 byte) : End code (omittable)
9. CR (1 byte) : Carriage return code
5. 1 TOSHIBA inverter protocol transmission
format
Omittable for one-to-one communication Only for W or P command Omittable
Checksum range
Omittable
(3.5byte
blank)
"("
(28H)
INV-NO
2 bytes
CMD
1 byte
Communication
No.
4 bytes
DATA
0 to 4 bytes
"&"
(26H)
SUM
2 bytes
")"
(29H)
CR
(0DH)
(3.5byte
blank)