Mitsubishi Electric FX3G SERIES Programming Manual page 213

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
3. Output drive side
The following two circuits result the same operation.
<OUT instruction>
X000 M1
X000
ON
X000
ON during
one operation
M 0
cycle
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 writing during RUN
1) Instructions for falling edge pulse
When writing is completed during RUN for a circuit including an instruction for falling edge pulse (LDF, ANDF, or
ORF instruction), the instruction for falling edge pulse is not executed regardless of the ON/OFF status of the
target device of the instruction for falling edge pulse.
When writing is completed during RUN for a circuit including an instruction for falling edge pulse (PLF instruction),
the instruction for falling edge pulse is not executed regardless of 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 writing is completed during RUN 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 writing is executed during RUN)
*1. PLS instruction is not executed.
2. Cautions on using latched (battery or EEPROM backed) type devices
When PLC mode is changed in the way "RUN → STOP → RUN" while a drive input remains ON, "PLS M0" operates,
but "PLS M600 (latched device)" does not operate (when the PLC mode switches from STOP to RUN) because the
status of M600 is latched even while the PLC is in the STOP mode.
M0
=
M1
PLS M0
K10 D0
Instruction for rising edge pulse
OFF
ON
<PLS instruction>
X000
PLS
<Pulse operation type applied instruction>
X000
FNC12
K10
MOVP
Instruction for falling edge pulse
Not executed
*1
Executed
7 Basic Instruction
7.12 PLS, PLF
M0
D0
Not executed
Not executed
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