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CHAPTER 5 DEVICES
5
5.8 Nesting (N)
5.8 Nesting (N)
Nesting (N) is a device used in the master control instructions (MC and MCR instructions) to program operation
conditions in a nesting structure. The master control instruction opens or closes a common ladder gate to efficiently
switch the ladder of a program. Specify the nesting (N) in ascending order (in order of N0 to N14), starting from the
outside of the nesting structure.
For use of the nesting, refer to the following.
MELSEC-Q/L Programming Manual (Common Instruction)
Executed when conditions A
and B are met.
Executed when conditions A,
B, and C are met.
Executed when conditions A
and B are met.
Executed when condition A is
met.
Executed when condition A is
met.
Specified in ascending order.
Specified in descending order.
Executed regardless of
conditions A, B, and C.
Control range
of nesting
N0
Control range
of nesting
N1
Control range
of nesting
N2