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FX Series Programmable Controllers Basic Program Instructions 2
2-16
Nested MC program example:
Level N0: Bus line (B) active when X0
is ON.
Level N1: Bus line (C) active when
both X0 and X2 are ON.
Level N2: Bus line (D) active when
X0,X2 and X4 are ON.
Level N1: MCRN2 executes and
restores bus line (C). If the MCR had
reset N0 then the original bus bar (A)
would now be active as all master
controls below nest level 0 would reset.
Level N0: MCRN1 executes and
restores bus line (B).
Initial state: MCR N0 executes and
restores the initial bus line (A).
Output Y5 turns ON/OFF according to
the ON/OFF state of X10, regardless of
the ON/OFF status of inputs X0, X2 or
X4.
X0
X1
M100N0MC
MCR
M100N0
X2
X3
M101N1MC
M101N1
X4
X5
M102N2MC
M102N2
MCR
X6
MCR
X7
X10
D
C
C
B
B
A
A
Y0
N2
Y1
Y2
N1
Y3
N0
Y4
Y5