Siemens SINAMICS G120 Operating Instructions Manual page 433

Explanation of the example using the ON/OFF1 command
Parameter p0840[0] is the input of the "ON/OFF1" block of the inverter. Parameter r20031 is
the output of the AND block. To interconnect ON/OFF1 with the output of the AND block, set
p0840 = 20031.
Figure A-9
Principle for interconnecting blocks
Always interconnect the input (connector or binector input) with the signal source.
Note
For the basic commissioning, you determine the function of the interfaces for your converter
via predefined settings (p0015).
If you subsequently select a different predefined setting for the function of the interfaces,
then all interconnections that you changed will be lost.
Converter with the CU250S-2 Control Unit (vector)
Operating Instructions, 06/2013, FW V4.6, A5E31759476B AB
Interconnecting blocks by setting p0840[0] = 20031
A.7 Interconnecting signals in the inverter
Appendix
433