Siemens SINUMERIK 840D sl Function Manual page 728

Software Cams, Position Switching Signals (N3)
Output of cam signals
Plus cam signals
The status of the plus cam signals is entered in the general
NC/PLC interface signals:
DB10 DBX114.0 to 117.7 (plus cam signals 1 to 32).
If no measuring system is selected or NC/PLC interface signal:
DB31, ... DBX2.0 (cam activation)
is set to 0,
then the following NC/PLC interface signals are also set to 0:
DB10 DBX110.0-113.7 (minus cam signals 1-32)
DB10 DBX114.0-117.7 (plus cam signals 1-32)
DB 31, ... DBX62.0 (Cam active)
9.3.3 Output of cam signals to NCK I/Os in position control cycle
Signal output in position control cycle
For the cams assigned to a hardware byte in machine data:
MD10470 SW_CAM_ASSIGN_FASTOUT_1
to
MD10473 SW_CAM_ASSIGN_FASTOUT_4,
the signal output takes place in the position control cycle.
The 4 onboard outputs on the NCU and a total of 32 optional external NCK outputs are
available as the digital outputs of the NCK I/Os.
References:
/FB2/ Function Manual, Extended Functions; Digital and Analog NCK I/Os (A4)
Hardware assignment
The assignment to the hardware bytes used is made for each eight cam pairs in the following
general machine data:
MD10470 SW_CAM_ASSIGN_FASTOUT_1
MD10471 SW_CAM_ASSIGN_FASTOUT_2
MD10472 SW_CAM_ASSIGN_FASTOUT_3
MD10473 SW_CAM_ASSIGN_FASTOUT_4
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Hardware assignment for output of cams 1 - 8 to
NCK I/Os
Hardware assignment for output of cams 9 - 16 to
NCK I/Os
Hardware assignment for output of cams 17 - 24
to NCK I/Os
Hardware assignment for output of cams 25 - 32
to NCK I/Os
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Extended Functions