Siemens SINAMICS G110M Function Manual page 141

The response returns register address (bytes 2 and 3) and the value (bytes 4 and 5), which
the higher-level control had written to the register.
Table 5- 22
Value
11 h
06 h
00 h
63 h
55 h
66 h
xx h
xx h
Table 5- 23
Write request
Incorrect address (a holding register address does not exist)
Write to a "read-only" register
Write to a reserved register
For Exception Code 4, via the holding register 40499, you can read out the internal drive
error code, which has occurred for the last parameter access via the holding register.
Fieldbuses
Function Manual, 04/2018, FW V4.7 SP10, A5E34229197B AE
Slave response to the write request
Byte Description
0 Slave address
1 Function code
2 Register start address "High"
3 Register start address "Low"
4 Register data "High"
5 Register data "Low"
6 CRC "Low"
7 CRC "High"
Invalid write request
Communication via RS485
5.4 Communication using Modbus RTU
Inverter response
Exception Code 02 - invalid data
address
Exception Code 04 - device failure
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