Siemens SINUMERIK 840Di Diagnostic Manual page 490

Overview of Alarms
NCK alarms
28030 Serious alarm on NCU %1, axes in follow-up mode
Parameters: %1 = NCU number
Definitions: All axes are trailing because of a serious alarm on another NCU.
Reaction: NC not ready.
Mode group not ready, also effective for single axes
NC Start disable in this channel.
Interface signals are set.
Alarm display.
NC Stop on alarm.
Remedy: Acknowledge the alarm on the NCU.
Program Clear alarm with the RESET key in all channels of this mode group. Restart part program.
Continuation:
28031 Serious alarm on NCU %1 not yet acknowledged, axes still in follow-up
mode
Parameters: %1 = NCU number
Definitions: A serious alarm was not yet acknowledged on another NCU. Consequently, all the axes continue to
trail.
Reaction: NC not ready.
Mode group not ready, also effective for single axes
NC Start disable in this channel.
Interface signals are set.
Alarm display.
NC Stop on alarm.
Remedy: Acknowledge the alarm on the NCU.
Program Alarm display showing cause of alarm disappears. No further operator action necessary.
Continuation:
28032 Emergency stop activated on NCU %1, axes in follow-up mode
Parameters: %1 = NCU number
Definitions: The emergency stop request is active at the PLC-NCK interface on one NCU of the NCU network.
Consequently, all axes are trailing.
Reaction: NC not ready.
Mode group not ready, also effective for single axes
NC Start disable in this channel.
Interface signals are set.
Alarm display.
NC Stop on alarm.
Remedy: Remedy the cause of the emergency stop on the NCU and acknowledge the emergency stop via the
PLC-NCK interface.
Program Clear alarm with the RESET key in all channels of this mode group. Restart part program.
Continuation:
2-490
© Siemens AG, 2006. All rights reserved
SINUMERIK, SIMODRIVE Diagnostics Manual (DA), 11/2006 Edition
11/2006