Siemens SINUMERIK 840D sl Function Manual page 689

Extended functions

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Modulo rotary axes

The switching edges of the cam signals are generated as a function of the rotary axis

traversing direction:

● The plus cam signal switches from 0 to 1 when the axis traverses the minus cam in a

● The minus cam signal changes level in response to every positive edge of the plus cam

Extended Functions

Function Manual, 01/2008, 6FC5397-1BP10-3BA0

Position switching signals:

If the axis is positioned exactly on the cam (plus or minus), the defined output flickers. If

the axis moves one increment further, the output becomes a definite zero or one.

Flickering of the actual position causes the signals to flicker in this manner.

The actual position is evaluated.

Software cams for linear axis (plus cam < minus cam)

positive axis direction and from 1 back to 0 when it traverses the plus cam.

The described response of the plus cam applies on condition that:

plus cam - minus cam < 180 degrees

Software cams, position switching signals (N3)

9.2 Cam signals and cam positions

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Sinumerik 840de sl