Zero-Speed Monitoring - Siemens SINUMERIK 840D sl Function Manual

A3: Axis Monitoring, Protection Zones
3.2 Axis monitoring functions
MD36020 $MA_POSITIONING_TIME (delay time exact stop fine)
After reaching "Exact stop fine", the position monitoring is deactivated.
Note
The smaller the exact stop fine tolerance is, the longer the positioning operation takes and the
longer the time until block change.
Rules for MD setting
MD36010 $MA_STOP_LIMIT_FINE
Large
Small
MD32200 $MA_POSCTRL_GAIN
(servo gain factor)
Small
Large
Effectiveness
The position monitoring only operates with active position control and the following axis types:
● Linear axes
● Rotary axes
● Position-controlled spindles
Fault
If the configured position-monitoring time is exceeded, the following alarm appears:
25080 "Axis <Axis name> Position monitoring"
The affected axis is stopped via the configured braking ramp in follow-up mode:
MD36610 $MA_AX_EMERGENCY_STOP_TIME
(maximum time for braking ramp when an error occurs)
3.2.2.3

Zero-speed monitoring

Function
At the end of a positioning operation:
● Set velocity = 0 AND
● DB31, ... DBX64.6/7 (motion command minus/plus) = 0
84
MD36020 $MA_POSITIONING_TIME
Can be selected relatively short
Must be selected relatively long
MD36020 $MA_POSITIONING_TIME
Must be selected relatively long
Can be selected relatively short
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions