Standstill Monitoring - Siemens SINUMERIK 802D sl Function Manual

Axis Monitoring (A3)
2.2 Motion monitoring functions
Cause of error/Remedy
● Position controller gain too low --> change machine data for position controller gain
● Positioning window (exact stop fine), position monitoring time, and position controller gain
Rule of thumb
● Positioning window large --> max. position monitoring time can be set to a relatively short
● Positioning window small --> max. position monitoring time must be set to a relatively
● Position controller gain low --> max. position monitoring time must be set to a relatively
● Position controller gain high --> max. position monitoring time can be set to a relatively
2.2.3

Standstill monitoring

Function
At the end of a motion block (position setpoint has reached target), a check is made as to
whether the axis is not more than the distance specified in
MD36040 STANDSTILL_DELAY_TIME (standstill monitoring delay time) away from its
setpoint after the configurable delay time in MD36060 STANDSTILL_POS_TOL (standstill
tolerance) has expired. Otherwise, an alarm will be triggered.
Effectiveness
Standstill monitoring is always active after "Standstill monitoring delay time" active has
expired, as long as no new travel command is present.
Standstill monitoring is active on axes and position-controlled spindles.
44
MD32200 POSCTRL_GAIN (servo gain factor)
have not been coordinated --> change machine data:
MD36010 STOP_LIMIT_FINE (exact stop fine),
MD36020 POSITIONING_TIME (exact stop fine delay time),
MD32200 POSCTRL_GAIN (servo gain factor)
value
long value
long value
short value
Note
The size of the positioning window affects the block change time. The smaller the
tolerances that are selected, the longer the positioning action will take, which in turn
means a longer time before the next command can be executed.
Turning, Milling, Nibbling
Function Manual, 11/2012, 6FC5397-1CP10-5BA0