5 SEQUENCE INSTRUCTIONS
5.5 Master Control Instruction
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5
Master control instructions can be used in a nested fashion. Each master control section is distinguished by
nesting (N). Nesting is available within the range N0 to N14.
A nested structure allows you to create a ladder for successively restricting program execution conditions.
A nested structure ladder is illustrated as follows:
(1) Executed when A is ON
(2) Executed when A and B are ON
(3) Executed when A, B, and C are ON
(4) Regardless of A, B, and C
MC N0 M15
MC
N1
M16
MC
N2 M17
MCR N2
MCR N1
MCR N0
N0
M15
N1 M16
N2 M17
A
B
C
MC N0 M15
MC
N1
M16
MC N2 M17
MCR N2
MCR N1
MCR N0
N0
M15
N1 M16
N2 M17
A
B
C
(1)
(2)
(3)
(2)
(1)
(4)
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