BENSHAW RSi SG Series, Instruction Manual

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Chapter 9 – RS485/Modbus RTU Communications
9-4
9.4 Communication Protocol (Modbus ‐ RTU)
Use Modbus-RTU protocol (Open protocol).
Computer or other hosts can be Master and Slave. The drive responds to Read/Write command from Master.
Supported function code
Function code
Description
0x03 Read Hold Register
0x04 Read Input Register
0x06 Preset Single 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.