Siemens Sinumerik 840D sl Diagnostic Manual page 371

03/2009
Remedy: Please inform the authorized personnel/service department.
- Check MD36040 $MA_STANDSTILL_DELAY_TIME and MD36030
$MA_STANDSTILL_POS_TOL; increase if necessary. The value must be greater than the machine
data "Exact stop - coarse" (MD36000 $MA_STOP_LIMIT_COARSE).
- Estimate machining forces and reduce if necessary by setting a lower feed or a higher rotational
speed.
- Increase clamping pressure.
- Increase the gain in the position control loop by improved optimization (Kv factor MD32200
$MA_POSCTRL_GAIN, SIMODRIVE611D drive).
Program Con- Clear alarm with the RESET key in all channels of this mode group. Restart part program.
tinuation:
25042 Axis %1 standstill monitoring during torque/force limitation
Parameters: %1 = Axis name, spindle number
Definitions: The defined end position was not reached within the time specified in the machine data.
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: - If the drive torque (FXST) was set too low with the result that the force of the motor was not sufficient
to reach the end position -> increase FXST.
- If the machined part is slowly deformed, there may be a delay in reaching the end position -> increase
MD36042 $MA_FOC_STANDSTILL_DELAY_TIME.
Program Con- Clear alarm with the RESET key in all channels of this mode group. Restart part program.
tinuation:
25050 Axis %1 contour monitoring
Parameters: %1 = Axis name, spindle number
Definitions: The NCK calculates for each interpolation point (setpoint) of an axis the actual value that should result
based on an internal model. If this calculated actual value and the true machine actual value differ by
a larger amount than given in the MD36400 $MA_CONTOUR_TOL, then the program is aborted and
the alarm message is issued.
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 tolerance value set in MD36400 $MA_CONTOUR_TOL is too small.
- Check optimization of the position controller (Kv factor in the MD32200 $MA_POSCTRL_GAIN) to
establish whether the axis follows the given setpoint without overshooting. Otherwise, the speed con-
troller optimization must be improved or the Kv servo gain factor must be reduced.
- Improvement of speed controller optimization
- Check the mechanics (smooth running, inertial masses).
Program Con- Clear alarm with the RESET key in all channels of this mode group. Restart part program.
tinuation:
© Siemens AG, 2009. All Rights Reserved
SINUMERIK 840D sl, 840Di sl, SINAMICS, Diagnostics Manual (DAsl), 03/2009
Overview of Alarms
NCK alarms
2-371