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Sequence Control Instructions Section 3-4
When nesting interlocks, assign interlock numbers so that the nested program
section does not exceed the outer program section.
Other instructions can be input between the MILC(519) instructions, as shown
in the following diagram.
If there is an ILC(003) instruction between an MILH(517) and MILC(519) pair,
the program section between MILH(517) and ILC(003) will be interlocked.
a
b
MILH
0
MILC
0
MILC
1
A1
MILH
1
A2
A3
The nested program section
must not go beyond the outer
program section.
a
b
MILH
0
100.00
MILC
1
MILC
0
A1
MILH
1
100.01
A2
A3
Other instructions can be inserted between
two MILC(519) instructions. In this case,
sections A1 and A3 operate together. (They
are interlocked when "a" is OFF, regardless
of the ON/OFF status of "b".)
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