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Thread: Skimmer Control (12 hrs pause) by Programmable Logic

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  1. #1
    Join Date
    14.11.2017
    Posts
    28

    Default Skimmer Control (12 hrs pause) by Programmable Logic

    Hello,
    Could anyone please help me to set up a programmable logic function for my skimmer?
    What I’m intending is as follows.
    When I feed coral food and hit feed pause 1 (FP1) at around 23:00, the skimmer stops until I hit feed pause 2 (FP2) next morning,
    or a timer gives a reset signal around 11:00. (for about 10~12hours).
    This is for preventing the skimmer from overflow or the coral food is stripped by the skimmer too early.

    I tried to write a programmable logic as follows.
    G1 : Or (PL1)
    Input 1 : FP2
    Input 2 : Timer 1

    G2 : SR-flipflop (PL2)
    Input 1 (set) : FP1
    Input 2 (reset) PL1

    Timer 1 (Process)
    Event start at 11:00

    Power Outlet 5
    PL2
    Invert

    This programmable logic does not work, so I tried to add a pulse (1s) after FP1 and FP2 before the input of their next gate, but nothing changed.
    I tried with Maintenance Mode, but the duration is too short, 5 hours?
    I fully understand the functions of those logic gates by my background, but I’m a very beginner for the PL of P4.
    What did I do wrong?
    Could you please give me a tip to achieve the function?
    Thanks in advance.

    Son
    Last edited by otimer; 05.08.2019 at 07:23.

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