Delta AS Series Programming Manual page 264

Instruction code
MC/MCR
Symbol
Explanation
1. MC sets the master control. When the MC instruction is executed, the instructions between MC and MCR are
executed as usual. When the MC instruction is OFF, the actions of the instructions between MC and MCR are as
described in the following table.
Instruction type
General-purpose timer
Timer in the function block
Accumulative timer
Counter
Coils driven by OUT
Devices driven by SET and RST
Applied instruction
2. MCR resets the master control, and is placed at the end of the master control program. There should not be any
contact instruction before MCR.
3. MC/MCR supports the nested program structure. There are at most 32 levels of nested program structures
(N0–N31). Refer to the example below.
Operand
N
Level of the nested
N ：
MC
program structure
MCR
The timer value is reset to zero. The coil and the contact
are OFF.
The timer value is reset to zero. The coil and the contact
are OFF.
The coil is OFF. The timer value and the state of the
contact remain the same.
The coil is OFF. The timer value and the state of the
contact remain the same.
All coils are OFF.
The states of the devices remain the same.
All applied instructions are not executed. The FOR/NEXT
loop is still repeated N times, but the actions of the
instructions inside the FOR/NEXT loop follow those of the
instructions between MC and MR.
C ha pt er 5 Bas ic I ns t r uc t i ons
Function
Setting/Resetting the master control
N0~N31
Description
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