Sequence Control Instructions - Omron CJ - INSTRUCTIONS REFERENCE MANUAL 07-2009 Reference Manual

3. Instructions

Sequence Control Instructions

Overview of Interlock Instructions
Interlock Instructions
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 differentiated instructions that were interlocked are
executed after the interlock is cleared.
• MULTI-INTERLOCK DIFFERENTIATION RELEASE and MULTI-INTERLOCK CLEAR (MILR(518)
and MILC(519))*
Note MILR(518) does not hold the status of the Differentiation Flag, so differentiated instructions that were inter-
locked are not executed after the interlock is cleared.
• These instructions are supported only by CS/CJ-series CPU Unit Ver. 2.0 or later and CJ2
CPU Units.
Differences between Interlocks and Multiple Interlocks
Regular interlocks (IL(002) and IL(003)) cannot be nested, but multiple interlocks (MILH(517),
MILR(518), and MILC(519)) can be nested. Ladder programming can be simplified by nesting multiple
interlocks, as shown in the following diagram.
Interlocks with MILH and MILC
a
MILH
A1
b
MILH
A2
c
MILH
A3
MILC
MILC
MILC
174
Interlocks with IL and ILC
a
0
a
1
a
2
2
1
0
IL
A1
ILC
b
IL
A2
ILC
b c
IL
A3
ILC
CS/CJ/NSJ Series Instructions Reference Manual (W474)