Siemens SINUMERIK 808D ADVANCED Diagnostic Manual page 314

SINUMERIK 808D ADVANCED alarms
3.2 NCK alarms
Interface signals are set.
Alarm display.
NC Stop on alarm.
Channel not ready.
Remedy: Please inform the authorized personnel/service department.
- Check the speed setpoint cable (bus cable).
- Check the actual values and direction of position control.
- Change the position control direction if the axis rotates uncontrollably -> axis-specific MD32110
$MA_ENC_FEEDBACK_POL [n] = < -1, 0, 1 >.
- Increase the monitoring limit value in MD 36200 $MA_AX_VELO_LIMIT.
Program Restart part program.Clear alarm with the RESET key in all channels of this mode group. Restart part program.
Continuation:
25031 Axis %1 actual velocity warning limit
Parameters: %1 = Axis name, spindle number
Definitions: The present velocity actual value is more than 80% of the limit value defined in the machine data.
(Internal test criterion activated by MD36690 $MA_AXIS_DIAGNOSIS, bit0)
Reaction: Alarm display.
Remedy: -
Program Clear alarm with the Delete key or NC START.
Continuation:
25040 Axis %1 standstill monitoring
Parameters: %1 = Axis name, spindle number
Definitions: The NC monitors to ensure that the position is held at zero speed. Monitoring is started after a time that can be set for
a specific axis in the MD36040 $MA_STANDSTILL_DELAY_TIME after interpolation has ended. A constant check is
made to determine whether the axis remains within the tolerance range given in MD36030
$MA_STANDSTILL_POS_TOL.
The following cases are possible:
1. The NC/PLC interface signal DB380x DBX2.1 (Servo enable) is zero because the axis has jammed mechanically.
Due to mechanical influences (e.g. high machining pressure), the axis is pushed outside the permissible position
tolerance.
2. With closed position control loop (without jamming) - NC/PLC interface signal DB380x DBX2.1 (Servo enable) is "1"
- the axis is pushed away from its position by mechanical forces with a small gain in the position control loop.
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 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).
Program Restart part program.Clear alarm with the RESET key in all channels of this mode group. Restart part program.
Continuation:
25050 Axis %1 contour monitoring
Parameters: %1 = Axis name, spindle number
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Diagnostics Manual, 08/2013, 6FC5398-6DP10-0BA1
Diagnostics Manual