Mitsubishi FX3U Series Programming Manual page 186

FX /FX Series Programmable Controllers
3U 3UC
Programming Manual - Basic & Applied Instruction Edition
3. Output drive side
The following two circuits cause a same operation.
<OUT instruction>
X000 M1
X000
ON
X000
M 0
ON
M 1
In each case, M0 is ON during only one operation cycle when X000 changes from OFF to ON.
<PLS instruction>
X000
M0
FNC12
MOV
In each case, MOV instruction is executed only once when X000 changes from OFF to ON.
Caution
1. Cautions on write during RUN
1) Instructions for falling edge pulse
When write during RUN is completed for a circuit including an instruction for falling edge pulse (LDF,
ANDF, or ORF instruction), the instruction for falling edge pulse is not executed without regard to the ON/
OFF status of the target device of the instruction for falling edge pulse.
When write during RUN is completed for a circuit including an instruction for falling edge pulse (PLF
instruction), the instruction for falling edge pulse is not executed without regard to the ON/OFF status of
the operation condition device.
It is necessary to set to ON the target device or operation condition device once and then set it to OFF for
executing the instruction for falling edge pulse.
2) Instructions for rising edge pulse
When write during RUN is completed for a circuit including an instruction for rising edge pulse, the
instruction for rising edge pulse is executed if a target device of the instruction for rising edge pulse or the
operation condition device is ON.
Target instructions for rising edge pulse: LDP, ANDP, ORP, and pulse operation type applied instructions
(such as MOVP)
Contact ON/OFF status
(while write during RUN is executed)
*1. PLS instruction is not executed.
184
M0
M1
ON during
one operation
cycle
PLS M0
K10 D0
Instruction for rising edge pulse
OFF
ON
<PLS instruction>
X000
=
<Pulse operation type applied instruction>
X000
FNC12
MOVP
Not executed
*1
Executed
7 Basic Instruction
7.11 PLS, PLF
PLS M0
K10 D0
Instruction for falling edge pulse
Not executed
Not executed