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Mitsubishi Electric A800 Programming Manual Page 136

800 series, plc function.
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MCR
• The master control release instruction that indicates the end of the master control range.
• Do not add a contact instruction to the front of the MCR instruction.
Program example
• The master control instruction can be used as a nesting structure. Each master control area is separated by nesting (N). N0
to N14 can be used for nesting.
A ladder in which the program execution conditions are limited successively can be created by using the nesting structure.
A ladder that uses a nesting structure is as follows.
Display in ladder mode
‰ ñ ˜ H ƒ ‚
A
B
C
[ ƒ h
‚ Å ‚ Ì • \ Ž ¦
Actual operation ladder
Sequence program
Sequence instructions
Executed
when A
turns ON.
Executed
when A
and B
turn ON.
Executed
when A, B
and C
turn ON.
Executed
when A
and B
turn ON.
Executed
when A
turns ON.
No affected by
A, B and C.
135
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