Toshiba RS485, VF-AS1 Series Appendix 3 Compatibility with the communication function, VF-A7

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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

Item

 

 

 

 

 

 

 

32-bit mode

For some parameters, including accel-

32-bit mode is not available. For all

Refer to

 

eration/deceleration time parameters,

parameters, access is made in 16-bit

Section 9.

 

data communication are carried out in

mode.

 

 

32-bit mode.

 

 

Handling of negative

Access is made in 32-bit mode.

Access is made in 16-bit mode. To

－

data specified with pa-

 

see if the value specified with a

 

rameters

 

parameter is signed or not, check the

 

 

 

adjustment range of the parameter.

 

Division of a frame

A frame can be sent with it divided into

No frame can be divided into smaller

Refer to

 

smaller frames if all the frames can be

frames. Do not place an interval cor-

Section

 

sent within approx. 0.5 sec.

responding to less than 1.5 bytes of

3.1.

 

 

data between frames to be sent.

 

Communication time-

0.5 sec.

0.1 sec.

 

out period (guide)

 

 

 

Receipt information in

Even if there is receipt information in

A frame must always begin with a start

 

front of the start code

front of the start code of a frame re-

code, otherwise it will be rejected.

 

 

ceived, the frame is assumed to begin

 

 

 

with the start code.

 

 

Reset command

When an inverter receives a reset com-

When an inverter receives a reset

Refer to

 

mand, it sends back a response before it

command, it sends back no response.

Section

 

is reset.

 

8.1.

RS485 baud rate

1200 to 38400 bps

9600 to 38400 bps

Refer to

 

 

 

Section

 

 

 

7.1.

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.

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Contents Tosvert VF-AS1 Series RS485 Communication Function E6581315②Read first Safety precautions E6581315Contents BIT15 BIT8BIT7 BIT0 General outlines of the communication functionBit Word Data transmission specifications BIT2About the handling of received frames Communication protocolMOUBUS-RTU Binary mode 2FH Toshiba Inverter ProtocolINV-NO CMD Data transmission format used in Ascii modeData transmission format Data5bytes Blank 28H Bytes Checksum areaINV-NO Data SUMData transmission format used in binary mode Byte Bytes Command receivedReturned for the 57H W and 50H P commands Sum 1 bytes Checksum not omissible 00H to FFHNorn 2FH Byte 4EH6EH BytesTransmission format of Block Communication Page Bytes Blank Start Code INV-NO Reads the data with the specified communication number CommandsDummy data is required for this command Block communication Computer InverterRFE03CR RFE03077BCRPage Format error Data transmission format does not match Transmission errorsCommunication There is no communication number that matches Broadcast communication function VF-AS1 From the computer H = 24d  trip status Examples of the use of communication commandsAscii mode Computer → Inverter Inverter → Computer RFC90CRExamples of Communication programs Input #1,B$ =LENS$ For I=1 to LNext GotoIf Count 0 then T=TIMER 160 T=TIMER COUNT=TIMER-TPrint #1,B$ Page MSComm1.Output = Text2.Text & Chr13 End Sub End IfText2.Text = Text1.Text = End Sub MODBUS-RTU protocol Inverter number MODBUS-RTU transmission format Read commandCRC 5bytes Blank Command 1 byte Write commandBlank Command 1 byte Text size is 8 bytes fixed InverterBit counter = Error codesCRC Generation End Return CRCInter-drive communication E6581315 QWiring 2-wire RS485 communication Never use pin-7 P11 QWiring 4-wire RS485 communication）Page Parameters relating to the slave side example Proportional control of speed =0.01%Slave 100.00Hz1 00% Slave 100.00Hz 00%90.00Hz 45.00Hz 80.00Hz 40.00HzTransmission format for inter-drive communication INV-NO 1 byte Inverter numberCommunication parameters 0OFFMODBUS-RTU Baud rate,  , Parity  Inverter numberMaster INV To Slave „ Timer Time-out period Computer linkPC → INV INV INV → PC PC → INVFree notes Send waiting time , Use this function for the following case PI OFF Commands and monitoring from the computerCommunication commands commands from the computer OFFBrake release B Electric Power quantityForcibly braked Preliminary excitation Braking answer BAWire RS485 communication FA32 „ AM analog output FA52 „ Terminal board output data FA50„ FM analog output FA51 Output terminal no Specified data outputRFD00CR Monitoring from the computerUnit 0.01% N·m Input terminal function selection 9 f119 „ Input terminal board status FD06, FE06RES BIT15„ Output terminal board status FD07, FE07 „ Inverter operating status 1 FD01, FE01 ST=ON ST=OFF„ Inverter operating status 2 FD42, FE42 „ Inverter operating status 3 FD49, FE49„ Inverter operating frequency mode status FD46, FE46 „ Inverter operating command mode status FD45, FE45Preset speed operation „ Cumulative operation time alarm monitor FE79 „ Alarm information monitor FC91Bit Specifications Remarks E6581315 „ Inverter model capacity code FB05 Model DataParameter Name Range Setting LED setting by communicationUtilizing panel LEDs and keys by communication „ Block Communication Function for LED Display Ascii LED display data code 00H-1FH are blank BlankFA10=0 Key utilization by communicationFA10=1 Parameter data EEP ROMPage FE19 Torque command Alarm codeFE02 Frequency command value 01Hz FE29 Input power E6581315 FD50 Light-load high-speed torque 01% Tion FE80 Cumulative power on time FE84 Binary input value option SUB Appendix 1 Table of data codesCan ESCAppendix 2 Response time Response time „ Data transmission timeAppendix 3 Compatibility with the communication function VF-A7Appendix 4 Troubleshooting Appendix 5 Connecting for RS485 communication TXA RXARXB TXB
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