January 2012 6.17 Monitoring Functions 955
6.17.4 Standstill monitoring
Standstill monitoring is effective during operation both with velocity
feedforward and with following error, as soon as the axes have reached the
positioning window.
If the position difference is greater than the value defined in
MP_checkPosStandstill, the error message Standstill monitoring in
[axis] appears. The message also appears if, while moving to a position, an
overshoot occurs that is larger than the value entered in
MP_checkPosStandstill, or if the axis moves in the opposite direction when
beginning a positioning movement.
Manually moving a spindle while the control loop is open (e.g. during a manual
tool change) causes following error to build up. This following error could
trigger activation of the standstill monitoring. Therefore, monitoring is only
active in the following situations:
If the axis is not a spindle and the parameter MP_checkPosStandstill >0.
Here it is not relevant whether the axis is in a control loop or not.
If the affected axis is a spindle and the parameter
MP_checkPosStandstill > 0, then the axis must be in a closed loop for
standstill monitoring to be effective.
Enter in MP_checkPosStandstill the threshold from which the standstill
monitoring should go into effect:
MP_checkPosStandstill
Standstill monitoring
Available from NCK software version: 597 110-01.
Format: Numerical value
Input: 0: Monitoring switched off
0.001 000 000 to 10 000 [mm]
Default: 10 000 [mm]
Access: LEVEL3
Reaction: RUN
Settings in the configuration editor MP number
Axes
ParameterSets
[Key name of the parameter set]
CfgControllerAuxil
checkPosStandstill 400602
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