PLS and PLF in Mitshubishi

Thread Starter

anhnha

Joined Apr 19, 2012
905
Just curious, in Mitsubishi PLC there are 2 instructions below.
PLS: leading edge output
PLF: trailing edge output
I just can't figure out what are the full forms of them.
Any idea? :)
 

MaxHeadRoom

Joined Jul 18, 2013
28,756
Do you mean how they are typically implemented?
They are typically used as a one shot leading/trailing edge trigger for a rung where an event may happen very briefly, do you need an example?
Max.
 

Thread Starter

anhnha

Joined Apr 19, 2012
905
Good evening!
Actually, I wanted to know why Mitsubishi choose letter PLS and PLF as abbreviations for leading and trailing edges respectively.
By the way, what is the difference between LDP and PLS?
 

MaxHeadRoom

Joined Jul 18, 2013
28,756
The LDP,LDF,ANP,ANF are all input instructions and register on a rising/falling edges.
PLS uses a input to pulse operate on an output function, timer,counter etc.
Why they chose those mnemonics is anyone's guess?
The Mits manual shows and example of each.
Max.
 
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