Siemens SINUMERIK 840C Installation Instructions Manual page 245

6 NC Machine Data (NC MD), NC Setting Data (NC SD)
6.4 Axis-specific MD 1 (axial data 1)
372*
Default value
200
NC MD 372* is used to specify the amount of time that is to elapse before zero speed
monitoring (NC MD 212*) is to be activated during the approach to position (set speed=0).
The time must be chosen so as to enable suppression of the largest possible following error.
Failure to specify an appropriate delay time will trigger alarm 112*.
If NC MD 372* is 0, the value defined in NC MD 156 ("Servo enable cutoff delay") is taken as
delay time for zero speed monitoring.
S
MD 372*
S
MD 372*
S....Following error (contouring error)
Acceleration during emergency retraction
376*
Default value
0
You can enter your own acceleration in this MD. An emergency retraction block an thus be
made to respond more quickly.
If the value=0, the acceleration is taken from machine data 276* or from the parameter set for
acceleration.
6–60
Delay time zero speed monitoring
Lower input limit Upper input limit
0
S
S
guided by the control
Lower input limit Upper input limit
0 99 000 000
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Siemens AG 1992 All Rights Reserved
Units
1 000 ms
Normal case : S<MD 212*
MD 212*
Time
Error situation : S>MD 212*
MD 212*
Time
Units
10 000units/s
6FC5197- AA50
SINUMERIK 840C (IA)
07.97
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