Omron SYSMAC CJ - REFERENCE MANUAL 08-2008 Reference Manual page 262

Sequence Control Instructions
222
a
b
Unlike the IL(002) interlocks, MILH(517) and MILR(518) interlocks can be
nested, so the operation of similar programs will be different if MILH(517) or
MILR(518) is used instead of ILC(002).
Program with MILH(517)/MILC(519) Interlocks
Execution
condition
a b
OFF ON Interlocked
OFF
ON OFF Not interlocked
ON ON Not interlocked
a
A1
A2
b
a
MILH
0
010000
A1
b
MILH
1
010001
A2
MILC
1
A3
MILC
0
Program section
A1 A2
Interlocked
Interlocked
Not interlocked
Section 3-5
MILH
0
A1
MILH
1
A2
MILC
1
MILC
0
A3
Not interlocked
Not interlocked
Not interlocked