N3: Software cams, position switching cycles - only 840D sl
8.2 Cam signals and cam positions
Extended Functions
544 Function Manual, 03/2013, 6FC5397-1BP40-3BA1
• SD41505 SW_CAM_PLUS_POS_TAB_3[n]
Position of plus cams 17 - 24
• SD41506 SW_CAM_MINUS_POS_TAB_4[n]
Position of minus cams 25 - 32
• SD41507 SW_CAM_PLUS_POS_TAB_4[n]
Position of plus cams 25 - 32
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
With the setting:
MD10260 CONVERT_SCALING_SYSTEM = 1
, the cam positions no longer refer to the configured basic dimension system, but to the
dimension system set in the following machine data:
MD10270 POS_TAB_SCALING_SYSTEM (measuring system of position tables)
Value Meaning
0 Metric
1 inch
MD10270 therefore defines the dimension system for position data from setting data
SD41500 … 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.
Writing/reading of cam positions
The setting data can be read and written via HMI, PLC and part program.
Accesses from the part program are not synchronous to machining.
Synchronization can only be achieved by means of a programmed block preprocessing stop
(
STOPRE command).
It is possible to read and write the cam positions with FB2 and FB3 in the PLC user program.
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