Master Control Instructions - Mitsubishi Electric M800VW Series Programming Manual

M800V/M80V Series PLC Programming Manual (1/2)
7 Basic Instructions

7.5 Master Control Instructions

7.5 Master Control Instructions
MC, MCR: Setting and resetting the master control
Setting
Bit device
data
X Y M L F
n
D
○ ○ ○ ○ ○
[Instruction symbol] [Execution condition]
MC
MCR
 Setting data
Setting data
n Nesting (N0 to N7)
D Number of device to turn ON
 Functions
 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 would look as shown below:
Ladder as displayed in ladder mode
X0
N1 M0
X1 X3 M7
M5
X6 X4
X0
X0F
IB-1501667-B
Usable devices
B SB T SM V T C
○ ○ ○
Command
n
D
Meaning
MC N1 M0
N1
Y47
Y4F
MCR N1
Y10
Con-
Word device
stant
D R/ZR W SW SD Z K
○ ○ ○ ○ ○
Master control ladder
Ladder as it actually operates
X0
MC N1 M0
M0
X1 X3 M7
Y47
M5
X6 X4
X0
MCR N1
XF
152
Digit
Level designa- Index
tion
H N
○
○
MC n D
MCR n
Data type
Nesting
Bit
Executed only
when X0 is ON
Y4F
Y10