PLS and PLF in Mitshubishi

Discussion in 'General Electronics Chat' started by anhnha, Mar 12, 2015.

  1. anhnha

    Thread Starter Active Member

    Apr 19, 2012
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    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? :)
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
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    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.
     
  3. Dodgydave

    AAC Fanatic!

    Jun 22, 2012
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  4. MaxHeadRoom

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    Correction::mad: I was thinking of the LDP/LDF ;)
    Max.
     
  5. anhnha

    Thread Starter Active Member

    Apr 19, 2012
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    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?
     
  6. MaxHeadRoom

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    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.
     
  7. anhnha

    Thread Starter Active Member

    Apr 19, 2012
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    Thanks. By knowing the abbreviations I can remember them faster.
     
  8. MaxHeadRoom

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    There is always the manual derived description, e.g. PLS = PulseSe(t) PLF = PulseFalling, etc.
    Max.
     
  9. anhnha

    Thread Starter Active Member

    Apr 19, 2012
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    Well, is it documented somewhere else?
    I thought PLS = Pulse Leading Edge(sound like S).
     
  10. MaxHeadRoom

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    I am referring to the Mitsubishi Programming manual for FX PLC's.
    Max.
     
  11. anhnha

    Thread Starter Active Member

    Apr 19, 2012
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    Could you attach it here? I can't find it online. Thanks.
     
  12. MaxHeadRoom

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    Jul 18, 2013
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