Okuma Alarm-D 4202 DNC-B Communication system abort
Not restorable error has occurred in the protocol A. (This alarm is not cleared unless the power is turned on again.)
1->No response is received when operation preparation is not completed.
2->DR OFF is detected when operation preparation is not completed.
3->Check sum parity error has occurred when operation preparation is not completed.
4->Overrun or framing error has occurred in RS232C interface.
5->Overflow of reception buffer
Probable Faulty Locations
1)Defective RS232C interface
2)Defective hardware or software of the host computer
3)Mismatch between the actual communication line specification (baud rate, code configuration, etc.) and the communication set by the communication parameters.
Measures to Take
1)Check the hardware and software of the host computer.
2)Change the channel being used to other channel by setting proper data at communication parameter. Change the connection of the connector to the proper position, accordingly.
3)Check the following communication specifications between the actual communication line specification and the communication parameters:
RS232C interface channel being used
Number of stop bits