Siemens SINUMERIK 840D sl Function Manual page 732

Software Cams, Position Switching Signals (N3)
Output of cam signals
Signal generation
MD10485 SW_CAM_MODE Bit 1
The above machine data must be set beforehand to specify
how the signals to be gated are to be generated:
Bit
Not set
set
Settings
The assignment of cam pairs to onboard outputs
is controlled by machine data:
MD10480 SW_CAM_TIMER_FASTOUT_MASK
(screen form for output of cam signals via timer interrupts to NCU).
In addition, the general machine data below must be set to explicitly select the mode of
operation:
MD10485 SW_CAM_MODE Bit0=1
Note
This function runs independently of the assignment in machine data:
MD10470 SW_CAM_ASSIGN_FASTOUT_1 or
MD10471 SW_CAM_ASSIGN_FASTOUT_2 or
MD10472 SW_CAM_ASSIGN_FASTOUT_3 or
MD10473 SW_CAM_ASSIGN_FASTOUT_4.
The onboard byte may not be used more than once at any one time.
732
Signal generation
Inversion of signal response of plus cam when:
plus cam - minus cam ≥ 180 degrees
No inversion of signal response of plus cam:
plus cam - minus cam ≥ 180 degrees
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Extended Functions