Mcs And Mcr (Master Control Set And Reset) - IDEC MICROSmart FC6A Series Ladder Programming Manual

MCS and MCR (Master Control Set and Reset)

The MCS (master control set) instruction is usually used in combination with the MCR (master control reset) instruction. The MCS
instruction can also be used with the END instruction, instead of the MCR instruction.
When the input preceding the MCS instruction is off, the MCS is executed so that all inputs to the portion between the MCS and the
MCR are forced off. When the input preceding the MCS instruction is on, the MCS is not executed so that the program following it
is executed according to the actual input statuses.
When the input condition to the MCS instruction is off and the MCS is executed, other instructions between the MCS and MCR are
executed as follows:
Instruction
SOTU
SOTD
OUT
OUTN
SET and RST
TML, TIM, TMH, and TMS
CNT, CDP, and CUD
SFR and SFRN
Input conditions cannot be set for the MCR instruction.
More than one MCS instruction can be used with one MCR instruction.
Corresponding MCS/MCR instructions cannot be nested within another pair of corresponding MCS/MCR instructions.
Ladder Diagram
MCS
I0
I1 Q0
MCR
Timing Chart
ON
Input I0
OFF
ON
Input I1
OFF
ON
Output Q0
OFF
When input I0 is off, MCS is executed so that the subsequent input is forced off.
When input I0 is on, MCS is not executed so that the following program is
executed according to the actual input statuses.
Rising edges (ON pulses) are not detected.
Falling edges (OFF pulses) are not detected.
All are turned off.
All are turned on.
All are held in current status.
Current values are reset to zero.
Timeout statuses are turned off.
Current values are held.
Pulse inputs are turned off.
Countout statuses are turned off.
Shift register bit statuses are held.
Pulse inputs are turned off.
The output from the last bit is turned off.
Program List
Instruction
LOD
MCS
LOD
OUT
MCR
FC6A S MICROS L
ERIES MART
Status
Data
I0
I1
Q0
P M
ADDER ROGRAMMING ANUAL
4: B
ASIC
FC9Y-B1726
I
NSTRUCTIONS
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