Axis %1 Drift Value Too Large; Axis %1 Positioning Monitoring - Siemens Sinamics S120 Diagnostic Manual

25070

Axis %1 drift value too large

Parameters: %1 = Axis name, spindle number
Definitions: Only with analog drives!
The permissible maximum value of drift (internal, integrated drift value of automatic drift compensation) was exceeded
during the last compensation operation. The permissible maximum value is defined in the axis-specific MD36710
$MA_DRIFT_LIMIT. The drift value itself is not limited.
Automatic drift compensation: MD36700 $MA_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 automatically compensated to zero by slowly integrating an internal drift value.
Drift compensation by hand: MD36700 $MA_DRIFT_ENABLE=0
A static offset can be added to the speed setpoint in the MD36720 $MA_DRIFT_VALUE. This is not included in the
drift monitoring because it acts like a voltage zero offset.
Reaction: Alarm display.
Remedy: 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).
Program Clear alarm with the Delete key or NC START.
Continuation:
25080

Axis %1 positioning monitoring

Parameters: %1 = Axis name, spindle number
Definitions: 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 MD36020 $MA_POSITIONING_TIME.
Exact stop coarse: MD36000 $MA_STOP_LIMIT_COARSE
Exact stop fine: MD36010 $MA_STOP_LIMIT_FINE
The alarm can be reprogrammed in the MD11412 $MN_ALARM_REACTION_CHAN_NOREADY (channel not ready).
Reaction: Mode group not ready.
The NC switches to follow-up mode.
Channel not ready.
NC Start disable in this channel.
Interface signals are set.
Alarm display.
NC Stop on alarm.
Channel not ready.
Remedy: Please inform the authorized personnel/service department. Check whether the exact stop limits (coarse and fine) cor-
respond to the dynamic possibilities of the axis, otherwise increase them, if necessary in connection with the position-
ing time set in MD36020 $MA_POSITIONING_TIME.
Check speed controller/position controller optimization; select highest possible gain.
Check setting of Kv factor (MD32200 $MA_POSCTRL_GAIN) and increase, if required.
Program Teileprogramm neu starten.Clear alarm with the RESET key in all channels of this mode group. Restart part program.
Continuation:
Alarms
Diagnostics Manual, 07/2010, 6FC5398-8BP40-0BA0
NCK alarms
351