Siemens SINUMERIK 840Di Diagnostic Manual page 384

Overview of Alarms
NCK alarms
21550 Channel %1 axis %2 Travel from hardware limit switch not possible.
Reason: %3
Parameters: %1 = Channel number
%2 = Axis name
%3 = Cause
Definitions: It has been tried to retract a following axis of an axis coupling or an output axis of a transformation
through the master axis or input axis of a transformation. This is not permitted in the current situation.
Possible reasons:
1 No permissible direction of retraction
2 Coupling not synchronous
3 Retraction not permitted for the active coupling
4 Reserved
5 Retraction not permitted for the active transformation
Reaction: NC Start disable in this channel.
Alarm display.
Remedy: Remedy for error cause:
1 Define another travel direction
2 Deactivate the coupling and travel the axis/axes separately
3 Deactivate the coupling and travel the axis/axes separately
4 Reserved
5 Deactivate the transformation and travel the axis/axes separately
Program Clear alarm with the RESET key. Restart part program
Continuation:
21600 Monitoring for ESR active
Definitions: -
Reaction: NC not ready.
Alarm display.
All alarm reactions are delayed by one IPO cycle with this alarm.
Remedy: The display can be suppressed with the machine data MD 11410: SUPPRESS_ALARM_MASK Bit 16
= 1
Program Alarm display showing cause of alarm disappears. No further operator action necessary.
Continuation:
21610 Channel %1 axis %2 encoder %3 frequency limit exceeded
Parameters: %1 = Channel number
%2 = Axis name, spindle number
%3 = String (encoder number)
Definitions: The maximum permissible frequency of the currently active encoder (axis-specific interface signal DB
31 - 48, DBX 1.5 and DBX 1.6) in the axis-specific machine data 36300 ENC_FREQ_LIMIT [n] (n ...
encoder number, 1 or 2) has been exceeded. The reference of the actual value to the mechanical
carriage position may be lost.
The alarm can be reprogrammed in the MD ALARM_REACTION_CHAN_NOREADY (channel not
ready).
Reaction: Mode group not ready.
Channel not ready.
NC Start disable in this channel.
Interface signals are set.
Alarm display.
NC Stop on alarm.
Channel not ready.
Remedy: Modify MD 36300: ENC_FREQ_LIMIT [n] and interface signal position measuring system 1/2 (DB 31
- 48, DBX 1.5 and DBX 1.6).
Program Clear alarm with the RESET key in all channels of this mode group. Restart part program.
Continuation:
2-384
© Siemens AG, 2006. All rights reserved
SINUMERIK, SIMODRIVE Diagnostics Manual (DA), 11/2006 Edition
11/2006