Software Version: Niagara 4
Error Code: Modbus Read Status Error Code 2
Error Code 2 indicates a device exception error. The Modbus device returned an exception code. Check that the register address is valid for the device, verify the function code is supported by the device, and ensure the requested operation is allowed (e.g., not trying to write to a read-only register). Refer to the Error Description field for the specific Modbus exception code.