Nesting (N) - Mitsubishi Electric MELSEC-Q Series User Manual

10 DEVICES

10.8 Nesting (N)

N0 N1
nesting nesting
control range control range
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(1) Definition
Nesting devices are used to nest MC or MCR master control instructions when
programming operating conditions.
(2) Designation method with master control
The master control instructions are used to open and close the ladders' common
bus so that switching of ladders may be executed efficiently by the sequence
program.
Nesting devices must be numbered in descending order (from N0 to N7) of
nested relation.
For details on how to use master control, refer to the QCPU(Q mode)/QnACPU
Programming Manual (Common Instructions).
N0
N1
N2
N2
nesting
control range
A
MC
M15
B
MC
M16
C
MC
M17
Designated in ascending
No. order
N0 M15
Executed when condition
"A" is satisfied.
N1 M16
Executed when conditions
"A" and "B" are satisfied.
N2 M17
Designated in descending
No. order
Executed when condition "
A", "B" and "C" are satisfied.
MCR N2
MC2 to 7 are reset.
Executed when conditions
"A" and "B" are satisfied.
MCR N1
MC1 to 7 are reset.
Executed when condition
"A" is satisfied.
MC N0
MC0 to 7 are reset.
Executed regardless of
A, B, C condition statuses.
MELSEC-Q
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