Toshiba TOSVERT VF-AS1 instruction manual Inter-drive communication

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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 f803 and 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.”)

<Conceptual illustration>

 

 

 

Master (60Hz)

Slave 1 (50Hz)

Slave 2 (40Hz)

Slave 3 (30Hz)

 

 

 

VF-AS1

VF-AS1

VF-AS1

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.

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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 powerE6581315 FD50 Light-load high-speed torque 01% Tion FE80 Cumulative power on timeFE84 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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