Tosvert VF-AS1 Series RS485 Communication Function
E6581315②
 Read first Safety precautions
E6581315
 Contents
 General outlines of the communication function
BIT15 BIT8BIT7 BIT0
Bit Word
 Data transmission specifications
BIT2
 Communication protocol
About the handling of received frames
MOUBUS-RTU
 Binary mode 2FH
Toshiba Inverter Protocol
 INV-NO CMD
Data transmission format used in Ascii mode
Data transmission format
Data
 5bytes Blank
28H Bytes Checksum area
 INV-NO
Data SUM
 Data transmission format used in binary mode
 Byte Bytes
Command received
Returned for the 57H W and 50H P commands
Sum 1 bytes Checksum not omissible 00H to FFH
 Norn
2FH Byte 4EH6EH Bytes
 Transmission format of Block Communication
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 Bytes Blank Start Code
 INV-NO
 Reads the data with the specified communication number
Commands
Dummy data is required for this command
Block communication Computer Inverter
 RFE03CR
RFE03077BCR
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 Transmission errors
Format error Data transmission format does not match
Communication 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 commands
Ascii mode Computer → Inverter Inverter → Computer
RFC90CR
 Examples of Communication programs
 Input #1,B$
=LENS$ For I=1 to L
Next
Goto
 160 T=TIMER COUNT=TIMER-T
If Count 0 then T=TIMER
Print #1,B$
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 End If
MSComm1.Output = Text2.Text & Chr13 End Sub
Text2.Text = Text1.Text = End Sub
 MODBUS-RTU protocol
Inverter number 
 Read command
MODBUS-RTU transmission format
CRC
 5bytes Blank Command 1 byte
Write command
Blank Command 1 byte
Text size is 8 bytes fixed Inverter
 Bit counter =
Error codes
CRC Generation
End Return CRC
 Inter-drive communication
 E6581315 QWiring 2-wire RS485 communication
Never use pin-7 P11 QWiring 4-wire RS485 communication)
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 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 40.00Hz
 Transmission format for inter-drive communication
INV-NO 1 byte Inverter number
 Communication parameters
0OFF
 MODBUS-RTU
 Baud rate,  , Parity 
Inverter number
 Master INV To Slave
 Timer Time-out period Computer link
PC → INV
INV INV → PC PC → INV
 Send waiting time , 
Free notes
Use this function for the following case
 PI OFF
Commands and monitoring from the computer
Communication commands commands from the computer
OFF
 Brake release B
Electric Power quantity
Forcibly braked Preliminary excitation
Braking answer BA
 Wire RS485 communication FA32
  AM analog output FA52
 Terminal board output data FA50
 FM analog output FA51
Output terminal no Specified data output
 Monitoring from the computer
RFD00CR
Unit 0.01% N·m
 Input terminal function selection 9 f119
 Input terminal board status FD06, FE06
RES
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 command mode status FD45, FE45
 Inverter operating frequency mode status FD46, FE46
Preset speed operation
  Alarm information monitor FC91
 Cumulative operation time alarm monitor FE79
Bit Specifications Remarks
 E6581315
  Inverter model capacity code FB05
Model Data
 LED setting by communication
Parameter Name Range Setting
Utilizing panel LEDs and keys by communication
  Block Communication Function for LED Display
 Ascii LED display data code 00H-1FH are blank
Blank
 Key utilization by communication
FA10=0
FA10=1
 Parameter data
 EEP
ROM
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 FE19 Torque command
Alarm code
FE02 Frequency command value 01Hz
FE29 Input power
 Tion FE80 Cumulative power on time
E6581315 FD50 Light-load high-speed torque 01%
FE84 Binary input value option
 SUB
Appendix 1 Table of data codes
Can
ESC
 Appendix 2 Response time
Response time  Data transmission time
 Appendix 3 Compatibility with the communication function
VF-A7
 Appendix 4 Troubleshooting
 Appendix 5 Connecting for RS485 communication
 TXA
RXA
RXB
TXB