Siemens SINUMERIK 840D Series Diagnostics Manual page 277

11.02
Definitions:
Reactions:
Remedy:
Program Continuation:
20002
Parameters:
Definitions:
Reactions:
Remedy:
Program Continuation:
20003
Parameters:
 Siemens AG, 2002. All rights reserved
SINUMERIK 840D/840Di/810D Diagnostics Guide (DA) – 11.02 Edition
At the beginning of phase 2 of reference point approach, the signal from the reduction
cam is no longer available.
Phase 2 of reference point approach begins when the axis remains stationary after decel-
eration to the reduction cam. The axis then starts in the opposite direction in order to
select the next zero marker of the measuring system on leaving the reduction cam or
approaching it again (negative/positive edge).
- NC Stop on alarm.
- NC Start disable in this channel.
- Alarm display.
- Interface signals are set.
- If the axis is a single axis when this alarm is triggered, the alarm is only effective for this
axis (not effective for e.g. the channel or mode group)
Please inform the authorized personnel/service department. Check whether the decelera-
tion path after the approach velocity is greater than the distance to reference point cam -
in which case the axis cannot stop until it is beyond the cam. Use longer cam or reduce
the approach velocity in machine data 34020 REFP_VELO_SEARCH_CAM.
When the axis has stopped at the cam, it must be checked whether the signal "DECEL-
ERATION REFERENCE POINT APPROACH" is still available at the interface to the NCK
(DB 31 - 48, DBX 12.7).
• Hardware: Wire break? Short circuit?
• Software: User program?
Clear alarm with the RESET key. Restart part program
Channel %1 axis %2 zero mark not found
%1 = Channel number
%2 = Axis name, spindle number
The zero marker of the incremental encoder is not within a defined section.
Phase 2 of reference point approach ends when the zero marker of the encoder has been
detected after the rising/falling edge of the PLC interface signal "DECELERATION REF-
ERENCE POINT APPROACH" (DB 31 - 48, DBX 12.7) has given the trigger start. The
maximum distance between the trigger start and the zero marker that follows is defined in
the machine data 34060 REFP_MAX_MARKER_DIST.
The monitor prevents a zero marker signal from being overtraveled and the next being
evaluated as reference point signal. (Faulty cam adjustment or excessive delay by the
PLC user program).
- NC Start disable in this channel.
- Interface signals are set.
- Alarm display.
- NC Stop on alarm.
- If the axis is a single axis when this alarm is triggered, the alarm is only effective for this
axis (not effective for e.g. the channel or mode group)
Please inform the authorized personnel/service department. Check the cam adjustment
and make sure that the distance is sufficient between the end of the cam and the zero
marker signal that follows. The path must be greater than the axis can cover in the PLC
cycle time.
Increase the machine data 34060 REFP_MAX_MARKER_DIST, but do not select a value
greater than the distance between the 2 zero markers. This might result in the monitor
being switched off.
Clear alarm with the RESET key. Restart part program
Channel %1 axis %2 measuring system error
%1 = Channel number
%2 = Axis name, spindle number
1 Alarms
1-277