Siemens SINUMERIK 840D sl Function Manual page 693

Figure 9-8 Software cams for modulo rotary axis (plus cam - minus cam > 180°)
Suppression of signal inversion
Machine data setting:
MD10485 SW_CAM_MODE Bit 1=1
can be used to select the suppression of signal inversion for:
plus cam - minus cam > 180°.
Extended Functions
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
Software cams, position switching signals (N3)
9.2 Cam signals and cam positions
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