Siemens SINUMERIK 840D Series Diagnostics Manual page 325

11.02
Program Continuation:
25070
Parameters:
Definitions:
Reactions:
Remedy:
Program Continuation:
25080
Parameters:
Definitions:
Reactions:
 Siemens AG, 2002. All rights reserved
SINUMERIK 840D/840Di/810D Diagnostics Guide (DA) – 11.02 Edition
• Check actual values: Local tight running of the carriage, speed dip by torque reduction
due to contact with workpiece/tool, travel against fixed obstacle, etc.
• Check direction of position control: Does the axis continue to rotate without control (not
on 611D drives)?
• Check the speed setpoint cable.
Clear alarm with the RESET key in all channels of this mode group. Restart part program.
Axis %1 drift value too large
%1 = Axis name, spindle number
Only in FM-NC with analog drives!
The permissible maximum value of drift (internal, integrated drift value of automatic drift
compensation) has been exceeded during the last compensation operation. The permissi-
ble maximum value is defined in the axis-specific machine data 36710 DRIFT_LIMIT. The
drift value itself is not limited.
Automatic drift compensation: MD 36700 DRIFT_ENABLE=1
The difference between actual and setpoint position (drift) is checked cyclically in the IPO
cycle when the axes are at zero speed. The difference is compensated automatically to
zero by slowly integrating an internal drift value.
Drift compensation by hand: MD 36700 DRIFT_ENABLE=0
A static offset can be added to the speed setpoint in the machine data 36720
DRIFT_VALUE. This is not included in the drift monitoring because it acts like a voltage
zero offset.
- Alarm display.
Please inform the authorized personnel/service department. Adjust the drift compensation
with the automatic drift compensation switched off at the drive until the position lag is
approximately zero. Then reactivate the automatic drift compensation in order to balance
out the dynamic drift changes (effects of heating up).
Clear alarm with the Delete key or NC START.
Axis %1 positioning monitoring
%1 = Axis name, spindle number
For blocks in which "exact stop" is effective, the axis must have reached the exact stop
window after the positioning time given in the axis-specific MD 36020
POSITIONING_TIME.
Exact stop coarse: MD 36000 STOP_LIMIT_COARSE
Exact stop fine: MD 36010 STOP_LIMIT_FINE
The alarm can be reprogrammed in the MD ALARM_REACTION_CHAN_NOREADY
(channel not ready).
- Mode group not ready.
- Channel not ready.
- 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)
- Channel not ready.
- NC Start disable in this channel.
- NC Stop on alarm.
- The NC switches to follow-up mode.
- Alarm display.
- Interface signals are set.
1 Alarms
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