Siemens SINUMERIK 840Di Function Manual page 78

Detailed Description
2.1 Motion monitoring functions
Effectivity
The zero speed monitoring only operates with active position control and the following axis
types:
• Linear axes
• Rotary axes
• Position-controlled spindles
Effect
Upon exceeding of the delay time and/or the standstill tolerance, the following occurs:
• Alarm: "25040 Axis <
• The affected axis is stopped via the configured braking ramp in follow-up mode:
• If the axis/spindle is involved in interpolation with other axes/spindles, these are brought
2.1.5 Exact stop and standstill tolerance dependent on the parameter set
For adaptation to different machining situations and/or axis dynamics, e.g.:
• Operating state A: High precision, long machining time
• Operating state B: Lower precision, shorter machining time
• Changing of the mass relationships after gear change
the positioning tolerances:
• MD36000 $MA_STOP_LIMIT_COARSE (exact stop coarse)
• MD36010 $MA_STOP_LIMIT_FINE (exact stop fine)
• MD36030 $MA_STANDSTILL_POS_TOL (standstill tolerance)
can be weighted with a common factor depending on the parameter set:
• MD36012 $MA_STOP_LIMIT_FACTOR (exact stop coarse/fine and standstill factor)
Because the factor applies in common for all three position tolerances, the relationship
between the values remains constant.
2-6
Axis identifier
MD36610 $MA_AX_EMERGENCY_STOP_TIME
(Duration of the brake ramp under fault conditions)
to a standstill with rapid stop (set velocity = 0).
> Zero speed monitoring"
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Axis Monitoring, Protection Zones (A3)