Siemens SINUMERIK 840C Installation Instructions Manual page 240

09.95
336*
NC MD 336* is used to define the speed at which the contour monitor is to be activated. At
speeds below this axis-specific threshold speed, the contour monitor remains inactive. The
zero speed monitor checks for illegal axis movements when the axes are at rest (alarm 112*).
For details, refer to Section entitled "Axis (Analog) and Spindle Installation".
344*
NC MD 344* must define the compensation value for a rotary axis, which is normally 360 000
(corresponding to one revolution of the rotating table).
When specifying values > 360 000, care must be taken that a corresponding number of
leadscrew error compensation points are provided (for details on leadscrew error
compensation, see Section entitled "Functional Descriptions").
356*
If the set warning limit is exceeded, interface signal DB 32, DR K, bit 5 is set.
360*
NC MD 360* is used to allocate the axes to the mode groups, i.e. to ensure that a channel will
traverse only the axes in its mode group and not those of other mode groups. Within a mode
group, several channels can process an axis successively, provided that axial synchronization
of the "Block End Value" for that axis was carried out (NC STOP NC START) if the axis
was previously traversed by another channel.
Mode groups without axes are possible.
_______
1) The warm restart function enables the allocation of axes to another mode group without a hardware reset and
without loss of the axes reference points (for a detailed description of the warm restart function, see Sect. 12)
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SINUMERIK 840C (IA)
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Default value Lower input limit
5
Rotary axis modulo value for LEC
Default value Lower input limit
360 000
IKA warning limit (as from SW 3)
Default value Lower input limit
– 9999 9999
Default value Lower input limit
1
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6 NC Machine Data (NC MD), NC Setting Data (NC SD)
Contour threshold speed
Upper input limit
+0 1 000 000
Upper input limit
±0 92 160 000
Upper input limit
+9999 9999
Mode group
Upper input limit
+1, 2
+1
6 (as from SW 4)
6FC5197- AA50
6.4 Axis-specific MD 1 (axial data 1)
Active on
Power On
Units
1 000 units/min (IS)
Active on
NC Stop
Units
units (MS)
Active
at once
Units
units (MS)
Active on
1)
Power On
Units
–
6–55