5 SEQUENCE INSTRUCTIONS
5.5 Master Control Instructions
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5
5.5 Master Control Instructions
Setting the master control, resetting the master control
MC, MCR
• The master control instruction is used to enable the creation of highly efficient ladder switching sequence programs,
through the opening and closing of a common bus for ladders.
• A ladder using the master control is as follows:
Inputting of contacts on the vertical bus is not necessary when programming in the write mode of a
programming tool. These will be automatically displayed when the "conversion" operation is conducted after
the creation of the ladder and then "read" mode is set.
n: Nesting (N0 to N14) (Nesting)
(D): Device number to be turned ON (bits)
Setting
data
Internal device R, ZR J\ U\G Zn Constant Others
Bit Word Bit Word N DY
n
(D) (Other than T, ST, C)
Basic
Process
High
performance
Redundant
Universal
LCPU
Command
MCR
MC
n
n
n
Master control ladder
D
MC
D
MCR
X0
X1
Ladder as displayed in GPP ladder mode
M0
n1
X3
M7
Y47
MC
M5
Y4F
X6
X4
n1
MCR
XF
Y40
M0
n1
X0
X1
M0
n1
X3
M7
Y47
MC
M5
Y4F
X6
X4
n1
MCR
XF
Y40
M0
n1
Ladder as it actually operates
Executed
only when
X0 is ON.
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