Siemens SINUMERIK 840D Diagnostics Manual page 362

1 Alarms
Remedy:
Program Continuation:
25060
Parameters:
Definitions:
Reactions:
Remedy:
Program Continuation:
25070
Parameters:
Definitions:
1-362
Please inform the authorized personnel/service department.
• Check whether the tolerance value set in MD 36400: CONTOUR_TOL is too small.
• Check optimization of the position controller (Kv factor in the machine data 32200
POSCTRL_GAIN) to establish whether the axis follows the given setpoint without over-
shooting. Otherwise, the speed controller 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).
Clear alarm with the RESET key in all channels of this mode group. Restart part program.
Axis %1 speed setpoint limitation
%1 = Axis name, spindle number
The speed setpoint has exceeded its upper limit for a longer period than allowed.
The maximum speed setpoint is limited to a certain percentage with the axis-specific
machine data 36210 CTRLOUT_LIMIT. The input value of 100% corresponds to the rated
speed of the motor and hence the rapid traverse velocity (default values: 840D=110%,
FM-NC=100%).
If the values are exceeded for a short time, then this is tolerated provided they do not last
longer than allowed for in the axis-specific MD 36220 CTRLOUT_LIMIT_TIME. The set-
point is limited during this time to the maximum value that has been set (MD 36210).
The alarm can be reprogrammed in the MD ALARM_REACTION_CHAN_NOREADY
(channel not ready).
- 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.
Please inform the authorized personnel/service department. If the drive controller has
been set correctly and if the machining conditions are those that normally prevail, then
this alarm should not occur.
• 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.
 Siemens AG, 2004. All rights reserved
SINUMERIK 840D/840Di/810D Diagnostics Guide (DA), 10.04 Edition
10.04