Siemens SINUMERIK 840C User Manual
Page 240
09.95
6 NC Machine Data (NC MD), NC Setting Data (NC SD)
6.4 Axis-specific MD 1 (axial data 1)
Contour threshold speed
336*
Default value
Lower input limit
Upper input limit
Units
5
+0
1 000 000
1 000 units/min (IS)
Active on
Power On
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”.
Rotary axis modulo value for LEC
344*
Default value
Lower input limit
Upper input limit
Units
360 000
±0
92 160 000
units (MS)
Active on
NC Stop
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”).
IKA
warning
limit
(as from SW 3)
356*
Default value
Lower input limit
Upper input limit
Units
– 9999 9999
+9999 9999
units (MS)
Active
at once
If the set warning limit is exceeded, interface signal DB 32, DR K, bit 5 is set.
Mode group
360*
Default value
Lower input limit
Upper input limit
Units
1
+1
+1, 2
6 (as from SW 4)
–
Active on
Power On
1)
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)
©
Siemens AG 1992 All Rights Reserved 6FC5197- AA50
6–55
SINUMERIK 840C (IA)