NOP is a null operation instruction, used in ladder diagrams and instruction lists. If you need to shield an output, use NOP instead.
NOP does not carry any operands. Inserting a NOP instruction between normal instructions has no effect on the program. However, if the written instruction is replaced with a NOP instruction, the changed program is deleted and the program changes, so the NOP instruction can be used. Edit the program.
NOP instruction format