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MC, MCR
MC
(1) If the execution command of the MC instruction is ON when master control is started, the result of the operation from the
MC instruction to the MCR instruction will be exactly as the instruction (ladder) shows.
If the execution command of the MC instruction is OFF, the result of the operation from the MC instruction to the MCR
instruction will be as shown below:
Device
High speed timer
Low speed timer
High speed retentive timer
Low speed retentive timer
Counter
Devices in OUT instruction
SET, RST
SFT Basic,
Devices in the following instructions: Maintain current status
Application
(2) Even when the MC instruction is OFF, instructions from the MC instruction to the MCR instruction will be executed, so
scan time will not be shortened.
When a ladder with master control contains instructions that do not require any contact instruction (such as FOR to NEXT,
EI, DI instructions), the CPU module executes these instructions regardless of the ON/OFF status of the MC instruction
execution command.
(3) By changing the device designated by
(4) Coils from devices designated by
Further, using these same devices with the OUT instruction or other instructions will cause them to become double coils,
so devices designated by
MCR
(1) This is the instruction for recovery from the master control, and indicates the end of the master control range of
operation.
(2) Do not place contact instructions before the MCR instruction.
(3) Use the MC instruction and MCR instruction of the same nesting number as a set.
However, when the MCR instructions are nested in one place, all master controls can be terminated with the lowest
nesting (N) number.
(Refer to the "Precautions for nesting" in the program example.)
Operation Error
(1) There is no operation error in the MC or MCR instruction.
160
Count value goes to 0, coils and contacts all go OFF.
Coils go OFF, but counter values and contacts all maintain
current status.
All turned OFF
, the MC instruction can use the same nesting (N) number as often as desired.
D
are turned ON when the MC instruction is ON.
D
should not be used within other instructions.
D
Device Status
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