Siemens Sinumerik 840D sl Function Manual page 202

Connecting Sensors/Actuators
7.1 Safety- -relevant input/output signals
Note
The multiple distribution/interlocking that can be parameterized in the NCK
machine data must be programmed by the user on the PLC side.
Processing the NCK- -SGE for 840D sl (multiple distribution)
Axis--specific/spindle--specific machine data is used to define which internal SPL
output is to be used for which function and which axis/spindle. Under the condition
that certain axes/spindles belong to the same safety group, it is possible to imple-
ment multiple distribution (1 NCK--SPL output is assigned, for example, to 3 axes
with the same function). In addition, when an internal NCK--SPL output is selected
via MD, it is also possible to define whether the inverted signal is also to be pro-
cessed.
NCK--SPL
OUTSI
Output 1
Output 2
Output x
...
Output n
Figure 7-7 Multiple distribution for NCK--SGE
Example
It must be possible to change over between the "safe software limit switches" 1 or
2 for axes 1, 2 and 3 as a group using an internal NCK--SPL output (OUTSI x).
The machine data must be parameterized as follows:
Axis 1: MD36973 $MA_SAFE_POS_SELECT_INPUT = OUTSI x
Axis 2: MD36973 $MA_SAFE_POS_SELECT_INPUT = OUTSI x
Axis 3: MD36973 $MA_SAFE_POS_SELECT_INPUT = OUTSI x
7-202
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
Multiple
distribution
...
...
...
...
...
NCK--SGE/
SGA
Inversion
Inversion
interface
...
...
SGE ...
Yes/ no
... ...
... ...
SGE ... Yes/ no
...
...
... ...
SGE ...
Yes/ no
... ...
...
© Siemens AG 2015 All Rights Reserved
10/15
Monitoring
comparators
for axis 1
for axis 2
for axis 3