Siemens SINUMERIK 840D sl Function Manual page 724

Software Cams, Position Switching Signals (N3)
Cam signals and cam positions
9.2.3 Cam positions
Setting cam positions
The cam positions of the plus and minus cams are defined via the following general setting
data:
SD41500 SW_CAM_MINUS_POS_TAB_1[n]
SD41501 SW_CAM_PLUS_POS_TAB_1[n]
SD41502 SW_CAM_MINUS_POS_TAB_2[n]
SD41503 SW_CAM_PLUS_POS_TAB_2[n]
SD41504 SW_CAM_MINUS_POS_TAB_3[n]
SD41505 SW_CAM_PLUS_POS_TAB_3[n]
SD41506 SW_CAM_MINUS_POS_TAB_4[n]
SD41507 SW_CAM_PLUS_POS_TAB_4[n]
Note
Owing to the grouping of cam pairs (eight in each group), it is possible to assign different
access authorization levels (e.g. for machine-related and workpiece-related cam positions).
The positions are entered in the machine coordinate system. No check is made with respect
to the maximum traversing range.
Dimension system metric/inch
MD10260 CONVERT_SCALING_SYSTEM=1
With the above machine data setting, the cam positions no longer refer to the basic system,
but to the system configured in machine data
MD10270 POS_TAB_SCALING_SYSTEM
MD10270 POS_TAB_SCALING_SYSTEM=0:
MD10270 POS_TAB_SCALING_SYSTEM=1:
MD10270 POS_TAB_SCALING_SYSTEM
The above machine data therefore defines the dimension system for position parameters
from setting data:
SD41500 to SD41507
A switchover with G70/G71 or G700/G710 has no effect.
Sensing of cam positions
To set the cam signals, the actual position of the axes is compared to the cam position.
724
Position of minus cams 1 - 8
Position of plus cams 1 – 8
Position of minus cams 9 - 16
Position of plus cams 9 - 16
Position of minus cams 17 - 24
Position of plus cams 17 - 24
Position of minus cams 25 - 32
Position of plus cams 25 - 32
Metric
inch
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Extended Functions