Siemens SINUMERIK 840D sl Programming Manual page 656

Motion synchronous actions
10.3 Main run variables for synchronized actions
Write MD and SD at the main run time
The currently set access authorization level must allow write access. The active states are
listed for all MD and SD in References: /LIS/, Lists (Book 1).
The MD and SD to be written must be addressed preceded by $$.
Example
Program code
ID=1 WHEN $AA_IW[X]>10 DO
$$SN_SW_CAM_PLUS_POS_TAB_1[0]=20
$$SN_SW_CAM_MINUS_POS_TAB_1[0]=30
656
Comments
; Changing the switching position
of software cams. Note: The
switching positions must be
changed two to three
interpolation cycles before they
reach their position.
Programming Manual, 06/2009, 6FC5398-2BP20-0BA0
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