Sequence Instructions

Note the following when nesting the instructions.

(1)The instructions can be nested to a level of eight (N0 to 7). When nesting them, use MC from lower to higher nesting (N) numbers and MCR from higher to lower numbers. In the opposite order, the PLC function cannot perform normal operation since the instructions cannot be nested.

Display in ladder mode

Actual operation ladder

A

B

Nesting numbers of MCR are opposite.

Since buses cross each other, normal master control ladder cannot be created.

(2)When the MCR instructions are gathered in one place in the nesting structure, all master controls can be terminated by one lowest nesting (N) number.

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Mitsubishi Electronics 700 Series, FR-A700 specifications 136