Siemens SINUMERIK 840D sl Function Manual page 716

Software Cams, Position Switching Signals (N3)
Cam signals and cam positions
9.2 Cam signals and cam positions
9.2.1 Generation of cam signals for separate output
General information
Both cam signals can be output to the PLC and to the NCK I/Os. Separate output of the plus
and minus cam signals makes it easy to detect whether the axis is within or outside the plus
or minus cam range.
Linear axes
The switching edges of the cam signals are generated as a function of the axis traversing
direction:
● The minus cam signal switches from 1 to 0 when the axis traverses the minus cam in the
● The plus cam signal switches from 0 to 1 when the axis traverses the plus cam in the
Figure 9-1
716
positive axis direction.
positive direction.
Software cams for linear axis (minus cam < plus cam)
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Extended Functions