Mitsubishi Electric MELSEC iQ-F Series Training Manual page 50

Useful application of the PLS/PLF instructions (Part 1)
X2
0
M0
3
Y0
Timing chart
The following shows the timing chart of a self-holding ladder created with the OUT instruction.
Compare this timing chart with the one of the self-holding ladder created with the PLS instruction.
X2
Y0
X0
If the rising edge pulse contact
operation of the previously described PLS/PLF instruction can be written more simply.
They can be used according to the content and function of the following programs.
When the PLS instruction is used
X2
0
M0 X0
3
Y 0
X0
X2
M0
Y0
X0
X2 X0
Y0
and the falling edge pulse contact
P LS M0
Y 0
Y0
When the rising edge pulse contact instruction
is used
X2 X0
0
Y0
50
PLS M0
Y0
are used, the
Y 0