Sinumerik Alarm 28010 NCU link: the NCU %1 has not received a message
%1 = NCU number
Error message of the NCU link module. During operation of the NCU link, a message from the local NCU to the NCU specified in the alarm parameter has failed. A hardware error may have occurred (e.g. sporadic disturbances on the communication line).
– Alarm display.
– Interface signals are set.
– NC not ready.
– Channel not ready.
– NC Start disable in this channel.
– NC Stop on alarm.
The message does not fail until several attempts have been made to repeat the communication. The number of repetitions can be increased with MD LINK_MAX_RETRY_CTR.
Switch control OFF – ON.
- Siemens Diagnostics Guide by Siemens