Remedy
Check request by the master:
- Value in the valid range?
- Function code valid?
- No impermissible write access? (e. g. with regard to read-only parameters)
Cause
The request by the master is invalid, e. g. invalid CRC checksum, non-supported function code, or impermissible data access.
Description
Modbus: incorrect request by master
Keypad display
Modbus request
Fault message ID
33186
Severity/response
Warning The inverter (slave) responds to the master with an error code:
- 0x01 = invalid function code
- 0x02 = invalid data address
- 0x03 = invalid data value
- 0x04 = slave device failure
Product categories