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PLS, PLF
(3) When designating a latch relay (L) for the execution command and turning the power supply
OFF to ON with the latch relay ON, the execution command turns OFF to ON at the first
scan, executing the PLS instruction and turning ON the designated device.
The device turned ON at the first scan after power-ON turns OFF at the next PLS instruction.
PLF
(1) Turns ON the designated device when the execution command is turned ON
turns OFF the device in any other case the execution command is turned ON
OFF
When there is one PLF instruction for the device designated by
specified device turns ON one scan.
See 3.7 for the operation to be performed when the PLF instruction for the same device is
executed more than once during one scan.
X5
(2) If the RUN/STOP/RESET switch is changed from RUN to STOP after the execution of the
PLF instruction, the PLF instruction will not be executed again even if the switch is set back
to RUN.
Operation Error
(1) There are no operation errors associated with the PLS or PLF instructions.
Program Example
(1) The following program executes the PLS instruction when X9 goes ON.
[Ladder Mode]
[Timing Chart]
5-34
5.3 Output Instruction
5.3.8 Leading edge and trailing edge output (PLS, PLF)
OFF, OFF
ON or ON
PLF
M0
ON
X9 OFF
ON
M9 OFF
1 scan
ON of the execution command).
ON
X5 OFF
M0 OFF
OFF, and
OFF (i.e., at
during one scan, the
D
ON
1 scan
1 scan
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