Edge-triggered differential
output
(PLS, PLF)
bnp>,p
Device
to
be converted into a pulse
(a) PLS
The PLS instruction turns the specified device
ON
for one scan of the sequence
program when the operation result from the preceding instructions changes from OFF
to
ON.
If the device is already in the
ON
state then the PLS instruction will turn the
device OFF
for
one sequence program scan.
ti
~p~,p
tt
Device
to
be converted into a pulse
(b) PLF
The PLF instruction turns the specified device
ON
for one scan
of
the sequence
program when the operation result from the instructions preceding the PLF instruction
changes from
ON
to OFF. If the specified device status is already
ON,
then the PLF
instruction turns the specified device OFF
for
one scan of the sequence program.
Examples of the PLS and PLF instruction are shown below
111
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