Okuma Alarm-D 4204 DNC-B Message format error
Error has occurred in the reception message in the protocol A.
As for the cause of the alarm, “6. Reception of unexpected message” is reported to the host computer.
None->Message exceeds 72 bytes (4000 bytes for NC program).
XXXXYY->Mistake in the data designated by the [SET] command.
YY :Byte position inside the data
Probable Faulty Locations
Defective software used at the host computer.
Text format mismatch due to mismatch of the version of DNC-B specification at the CNC
Measures to Take
Check the set data against the upper and lower limits of the text format specified in the DNC-B specification.