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8.5. "06 (0x06) Write Single Register" function
This Modbus request is used to write a given value (Present Data) to the address
supplied (Register Address).
Request format:
Byte Meaning
0 Function Code = 06h
1 Register Address Hi
2 Register Address Lo
3 Preset Data Hi
4 Preset Data Lo
Response format:
Byte Meaning
0 Function Code = 06h
1 Register Address Hi
2 Register Address Lo
3 Preset Data Hi
4 Preset Data Lo
Exception response format:
Byte Meaning
0 Function Code = 86h
1
Exception Code =
01 (Illegal Function)
02 (Illegal Data Address)
03 (Illegal Data Value)
04 (Slave Device Failure)
Notes
As for the EEPROM parameter, first the data is written to RAM, after that the data is written to
EEPROM. Some EEPROM parameters cannot be changed during the inverter is running.
When write to EEPROM parameter that will change inverter status from stop to run, the inverter must
be in the state that it cannot run.
For example: To write to EEPROM, the inverter must open ST-CC. (display shows "OFF")
If not, the data is only written to RAM.
The Life of EEPROM is approximately 100,000 times. Avoid writing a command more than 100,000
times to the same parameter of the Inverter.
Please access only parameters in document.