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Thread: FMM - Solenoid turning off improperly

  1. #1
    Regular Vistor
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    FMM - Solenoid turning off improperly

    I currently have two FMMs one for my water change closet and a second for my main display. On both systems I’m attempting to automate a solenoid to top off containers. One being my main RODI storage and the second my ATO reservoir. I have both systems coded similarly and on each the solenoid is turning off early. Any assistance would be much appreciated.

    RO system:

    Fallback set OFF
    Set OFF
    RO_HI CLOSED set OFF
    RO_LO OPEN set ON

    ATO system:
    Fallback set OFF
    Set OFF
    TO_HI CLOSED set OFF
    TO_LO OPEN set ON

    On both the solenoid will turn on when the level is low. However, it will automatically turn off far before closing the HI sensor.

  2. #2
    Frequent Visitor Todd's Avatar
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    Take out the SET OFF commands. The SET command is always true so will take affect if nothing supersedes it. The CLOSED condition won't be true until water reaches the switch.

  3. #3
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    Thanks!

    So a simple;

    IF RO_HI CLOSED then OFF
    IF RO_LO OPEN then OFF

    Will work?

    I also have a lead probe in a 5 gallon bucket that is attached to the RO tank as an overflow. Would “RO_LEA CLOSED then OFF” be appropriate?

    Apologizes for being so lost, I have no coding basis but definitely wanting to learn!

  4. #4
    Frequent Visitor Todd's Avatar
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    RO system:

    Fallback OFF
    RO_HI CLOSED set OFF
    RO_LO OPEN set ON


    ATO system:
    Fallback OFF
    TO_HI CLOSED set OFF
    TO_LO OPEN set ON


    I don't understand your question regarding the 5 gal bucket.

    EDIT
    Sorry I totally butchered that. I did a copy paste and didnt check it.

  5. #5
    Apex User zombie's Avatar
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    Corrected syntax errors and lack of failsafes...

    RO system:
    Fallback OFF
    If RO_LO OPEN Then ON
    If RO_HI CLOSED Then OFF
    If RO_LEA CLOSED then OFF

    ATO system:
    Fallback OFF
    Set OFF
    If TO_HI CLOSED Then OFF
    If TO_LO OPEN Then ON
    Defer 000:10 Then ON
    Defer 000:10 Then OFF
    Min Time 060:00 Then OFF
    When On > 005:00 Then OFF



    You might be an engineer if...You have no life and can prove it mathematically.

  6. #6
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    Sorry not the clearest

    My RO tank has an overflow pipe that at one point was plumbed outside. In my current house this isn’t possible so I utilized a pipe into the 5 gallon bucket to allow for a little extra overflow Incase I forgot.

    I just recently purchased a leak probe to place in that bucket as a failsafe and am looking to have it turn off the solenoid if it ever senses water.

    Would “IF RO_Leak CLOSED then OFF” be the correct code?

  7. #7
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    Quote Originally Posted by ajs2294 View Post
    Sorry not the clearest

    My RO tank has an overflow pipe that at one point was plumbed outside. In my current house this isn’t possible so I utilized a pipe into the 5 gallon bucket to allow for a little extra overflow Incase I forgot.

    I just recently purchased a leak probe to place in that bucket as a failsafe and am looking to have it turn off the solenoid if it ever senses water.

    Would “IF RO_Leak CLOSED then OFF” be the correct code?
    Yes. That line is included in code I show in post 5.

    You might be an engineer if...You have no life and can prove it mathematically.

  8. #8
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    Awesome thanks, I missed your post while typing a response. Much appreciated!

    Is there anywhere I can read up on different commands that I can utilize? Thanks again for your help

  9. #9
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    The comprehensive user manual has all of them except for the some module specific ones from newer modules and the new when command.

    The when command says If Outlet XX is ON (or off) for more than YY amount of time than set the outlet to manual OFF (or ON).

    You might be an engineer if...You have no life and can prove it mathematically.

  10. #10
    Frequent Visitor Todd's Avatar
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    Sorry for my sloppy response. I did a copy paste/edit and didnt pay attention to the final result.

  11. #11
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    I copied the coding over and the solenoid for RO is still turning off well before the RO_HI is closed. Any ideas?

  12. #12
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    Is the leak sensor CLOSED right now?

    You might be an engineer if...You have no life and can prove it mathematically.

  13. #13
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    Leak sensor is open. Both solenoids turn off before filling containers to HI sensors

  14. #14
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    Copy paste directly from your outlet. You might have made a copy paste error. Also if the water level is in between and you set to AUTO it will be OFF until it hits the low sensor. You have to set it to manual ON and then slide to AUTO if you want it to fill to the top the first time.

    You might be an engineer if...You have no life and can prove it mathematically.

  15. #15
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    Fallback OFF
    If TO_HI CLOSED Then OFF
    If TO_LO OPEN Then ON

  16. #16
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    Is the power to the solenoid connected to a wall outlet or to an outlet on the energy bar?

    If connected to the energy bar, what is the programming in that outlet?


    Sent from my iPhone using Tapatalk

  17. #17
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    Did you copy past the wrong one? Those switch names are your ATO switches.

    You might be an engineer if...You have no life and can prove it mathematically.

  18. #18
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    Yes sorry I did copy over the wrong one.

    I have tried each code in this thread and all combinations. For whatever reason the solenoids turn off themselves on auto

    They are connected to the EB

    I'm wondering if I would be better off running 1 optical sensor on each?

  19. #19
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    Quote Originally Posted by ajs2294 View Post
    Yes sorry I did copy over the wrong one.

    I have tried each code in this thread and all combinations. For whatever reason the solenoids turn off themselves on auto

    They are connected to the EB

    I'm wondering if I would be better off running 1 optical sensor on each?
    What is the programming on the outlet on the EB?


    Sent from my iPhone using Tapatalk

  20. #20
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    Was tired when responding the solenoid is plugged in using the 24V with above programming

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