Overview Of Interlock Instructions - Omron CP - PROGRAMMING MANUAL 05-2007 Programming Manual

Sequence Control Instructions
3-4-2 NO OPERATION: NOP(000)
Purpose
Ladder Symbol
Variations
Applicable Program Areas
Description
Flags
Precautions
3-4-3

Overview of Interlock Instructions

Interlock Instructions
This instruction has no function. (No processing is performed for NOP(000).)
There is no ladder symbol associated with NOP(000).
Variations Executed Each Cycle for ON Condition
Immediate Refreshing Specification
Block program areas
OK OK
No processing is performed for NOP(000), but this instruction can be used to
set aside lines in the program where instructions will be inserted later. When
the instructions are inserted later, there will be no change in program
addresses.
No flags are affected by NOP(000).
NOP(000) can only be used with mnemonic displays, not with ladder pro-
grams.
The following instruction combinations can be used to interlock outputs in a
program section.
• INTERLOCK and INTERLOCK CLEAR (IL(002) and IL(003))
• MULTI-INTERLOCK DIFFERENTIATION HOLD and MULTI-INTERLOCK
CLEAR (MILH(517) and MILC(519))*
Note MILH(517) holds the status of the Differentiation Flag, so differen-
tiated instructions that were interlocked are executed after the in-
terlock is cleared.
• MULTI-INTERLOCK DIFFERENTIATION RELEASE and MULTI-INTER-
LOCK CLEAR (MILR(518) and MILC(519))*
Note MILR(518) does not hold the status of the Differentiation Flag, so
differentiated instructions that were interlocked are not executed af-
ter the interlock is cleared.
Step program areas Subroutines
OK
Section 3-4
NOP(000)
Not supported
Interrupt tasks
OK
133