Use of Mitsubishi PLC NOP command

The Mitsubishi PLC instruction NOP is a null operation instruction, which is mainly used for short circuit, changing circuit function and program debugging.

Adding some empty operation instructions to the program has no effect on the logical operation result, but when the program is changed later, the empty operation instruction is replaced by other instructions, which can reduce the program number change.

The following figure shows an example of the NOP instruction application. The number of empty operation instructions can be increased as needed.