Multiple Distribution And Multiple Interlocking - Siemens SINUMERIK 840D sl Function Manual

8.1.5

Multiple distribution and multiple interlocking

Interlocking functions between the SGE/SGA are implemented in the NCK channel in the NCK-
SPL. However, in order to relieve the NCK-SPL, it is also possible to pre-process signals
between the NCK-SPL and NCK monitoring channel using the "multiple distribution" and
"multiple interlocking" functions.
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 implement 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 processed.
Figure 8-7
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
Safety Integrated
Function Manual, 12/2017, 6FC5397-4BP40-6BA1
Multiple distribution for NCK-SGE
Connecting sensors and actuators
8.1 Safety-related input/output signals
183