Chapter 10 – Modbus-RTU Communication
10-2
10.3 Communication Parameters
Parameter Display Name Set value Unit
SET-09 Drive mode Drive mode
Int. 485
SET-10 Freq mode Freq mode
Int. 485
I/O_20~27 M1 ~ M8 Programmable Digital Inputs
I/O_90 Inv Number VFD ID number
1~250
I/O_91 Baud rate Communication speed 1200
2400
4800
9600
19200
38,400
bps
I/O_92 COM Lost Cmd Operating mode when
communication signal is lost
Hold
Coast
Decel
I/O_93 COM Time Out Time to determine the loss of
communication signal.
0.1~120.0 sec
10.4 Modbus-RTU Communication protocol
VFD responds to Read/Write commands from Master control device.
Supported function code
Function code Description
0x03 Read Hold Register
0x04 Read Input Register
0x10 Preset Multiple Register
Exception code
Function code Description
0x01 ILLEGAL FUNCTION
0x02 ILLEGAL DATA ADDRESS
0x03 ILLEGAL DATA VALUE
0x06 SLAVE DEVICE BUSY
User define 0x14 1. Write Disable (Address 0x0004 value is 0)
2. Read Only or Not Program during Running.
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