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FX Series Programmable Controllers Basic Program Instructions 2
2-22
2.19 No Operation
Basic points to remember:
- Writing NOP instructions in the middle of a program minimizes step number changes
when changing or editing a program.
- It is possible to change the operation of a circuit by replacing programmed instructions
with NOP instructions.
- Changing a LD, LDI, ANB or an ORB instruction with a NOP instruction will change the
circuit considerably; quite possibly resulting in an error being generated.
- After the program ‘all clear operation’ is executed, all of the instructions currently in the
program are over written with NOP’s.
Mnemonic Function Format Devices Program steps
NOP
(No Operation)
No operation or
null step
N/A N/A 1