Fault:
Remedy:
120201 Communication interrupted
Definition
The operator panel is connected with the NC and PLC via a serial bus. This alarm occurs if the communication to these components is faulty. Together with this alarm, all display values connected with NC/PLC become invalid. Such malfunctions are normal during startup of the controls (e.g. after reset).
Reaction
Alarm display.
Remedy
The alarm disappears automatically as soon as the error situation is terminated. If this alarm is pending permanently, this may have very different error causes (e.g. cable break, no startup of NC/PLC, incorrect address/baud rate configuring of one of the bus nodes etc.).
120202 Waiting for connection to NC
Definition
The operator panel is connected to the NC and PLC via a serial bus. This alarm occurs when the MMC is started up for the first time if the NC/PLC power-up is not yet complete, or if an error occurs during communication between these components. All display values associated with the NC/PLC are rendered invalid by this alarm. Such malfunctions are normal during startup of the controls (e.g. after reset).
Reaction
Alarm display.
Remedy
The alarm disappears automatically as soon as the error situation is terminated. If this alarm is pending permanently, this may have very different error causes (e.g. cable break, no startup of NC/PLC, incorrect address/baud rate configuring of one of the bus nodes etc.).
If it does not work later, can try cleaning the connectors or replacing the line.