Siemens SINUMERIK 840D sl Function Manual page 1094

NC/PLC Interface Signals (Z2)
Software cams, position switching signals
19.9 Software cams, position switching signals
19.9.1 Signal overview
PLC interface signals for "Software cams, position switching signals"
19.9.2 Signals from NC (DB10)
DB10
DBX110.0-113.7 Minus cam signal 1-32
Edge evaluation: No
Signal state 1 or The switching edge of the minus cam signal 1-32 is generated as a function of the traversing
edge change 0 → 1 direction of the (rotary) axis and transferred to the PLC interface in the IPO cycle.
Linear axis:
The minus cam signal switches from 0 to 1 if the axis overtravels the minus cam in the negative
axis direction.
Modulo rotary axis:
The minus cam signal changes level in response to every positive edge of the plus cam signal.
1094
Signal(s) updated: Cyclic
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Extended Functions