Delta C200 Series User Manual page 319

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Mnemonic
Master control Start/Reset
MC/MCR
Operand
1. MC is the main-control start command. When the MC command is executed, the
execution of commands between MC and MCR will not be interrupted. When MC
command is OFF, the motion of the commands that between MC and MCR is
described as follows:
Timer
Accumulative timer
Subroutine timer
Counter
Coils driven up by the OUT
command
Devices driven up by the SET
and RST commands
Application commands
2. MCR is the main-control ending command that is placed at the end of the
main-control program and there should not be any contact commands prior to the
MCR command.
3. Commands of the MC-MCR main-control program support the nest program
structure, with 8 layers as its greatest. Please use the commands in order from N0~
N7, and refer to the following:
Ladder Diagram:
Example
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N0~N7
Command
X0
MC
X1
Y0
X2
MC
X3
Y1
MCR
MCR
X10
MC
X11
Y10
MCR
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Function
The counting value is set back to zero, the coil and
the contact are both turned OFF
The coil is OFF, and the timer value and the
contact stay at their present condition
The counting value is back to zero. Both coil and
contact are turned OFF.
The coil is OFF, and the counting value and the
contact stay at their present condition
All turned OFF
Stay at present condition
All of them are not acted , but the nest loop
FOR-NEXT command will still be executed for
times defined by users even though the MC-MCR
commands is OFF.
Command code:
LD
N0
MC
LD
N1
OUT
:
LD
N1
MC
N0
N0
LD
OUT
:
N0
MCR
14-34
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Chapter 14 PLC Function |C200 Series
Description
Operation:
Load A contact of X0
X0
Enable N0 common
series connection
N0
contact
Load A contact of X1
X1
Drive Y0 coil
Y0
Load A contact of X2
X2
Enable N1 common
series connection
N1
contact
Load A contact of X3
X3
Drive Y1 coil
Y1
Disable N1 common
series connection
N1
contact
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