Mitsubishi Electric MELSEC FX Series Structured Programming Manual page 96

FXCPU Structured Programming Manual
(Basic & Applied Instruction)
Cautions
1) When write during RUN is completed for a circuit including an instruction for falling edge pulse (LDF,
ANDF or ORF instruction), the instruction 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 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) When write during RUN is completed for a circuit including an instruction for rising edge pulse, the
instruction 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
*1. PLS instruction is not executed.
3) Some restrictions to applicable devices
1: Excluding special auxiliary relays (M)
2: Only the FX
The following devices cannot be indexed.
• Special auxiliary relays (M)
94
Instruction for rising edge pulse
executed)
OFF
ON
and FX PLCs are capable of indexing applicable devices.
3U 3UC
Instruction for falling edge pulse
Not executed
*1
Executed
5 Basic Instruction
5.11 PLS, PLF
Not executed
Not executed