FC300
Chapter 6 RS485 Communication protocol
Abnormal code
0x01
0x02
0x03
0x04
0x05
Corresponding meaning
Illegal function code
Illegal Address
Illegal data
Slave operation failure
Frame error
6.4 Function Explanation
Function 0x03: to read several (max. 5 together) multi-functionparameters and status
words of inverter.
Content
Request
Function code
Register Starting Address
Register data
Response
Function code
Read the numbers of bytes
Read the contents
Data length (bytes)
1
2
2
1
1
2* register quantity
Range
0x03
0x0000 0xFFFF
0x0001 0x0010
0x03
2* register quantity
Function 0x06: to rewrite single function code or control parameter of inverter.
Content
Request
Function code
Register address
Register data
Response:
Function code
Register address
Function data
Data length (bytes)
1
2
2
1
2
2
Range
0x06
0x0000 0xFFFF
0x0000 0xFFFF
0x06
0x0000 0xFFFF
0x0000 0xFFFF
6.5 Inverter Register Address Distribution
0x0000-0x0fff
0x8000
0x8001
0x8100
0x8101
Inverter functional parameters
Virtual Terminal Low 16-bit
Virtual Terminal high 16-bit
Inverter status word
Set frequency
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