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Thread: ATO goes to max time and then goes “off”

  1. #1
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    ATO goes to max time and then goes “off”

    So the ATO was going fine until recently-made a couple of small changes and then this behavior now happens:

    If the pump activates -it will go to the full two minutes (I reduced it from five) regardless if the lower optical switch closes-
    Then it goes to “off” from auto.

    So I have to manually turn it back to auto in which the process repeats itself-

    I took off the set=off per something that Russ had posted.

    Code below. Any input appreciated.

    Lawrence


    Fallback OFF
    If LOWATK OPEN Then ON
    If ATO_OP OPEN Then OFF
    If HI_ATK CLOSED Then OFF
    When On > 002:00 Then OFF
    Defer 000:10 Then ON
    Defer 000:04 Then OFF
    Min Time 060:00 Then OFF




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  2. #2
    Master Control Freak RussM's Avatar
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    Add the Set OFF back in (right after the Fallback OFF line). If you saw me suggest removing a Set statement from someone else's programming, it would have been for a different scenario - probably the refilling of an ATO reservoir, not for basic ATK operation.

    I'd rather not guess - What & where exactly are the LOWATK and ATO_OP sensors?
    Please do not send me PMs with technical questions or requesting assistance - use the forums for Apex help. PM me ONLY if the matter is of a private or personal nature. Thanks.

  3. #3
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    Russ
    Thanks-that worked putting back the set=off.
    Can you explain why? At a loss.

    What I (mis?)read what you wrote was in general and not any specific code on the forum. Wish I could find it again.


    The atklow is the lower optical sensor on the actual atk device. The atk_op is the optical sensor in the water reservoir.

    LB


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  4. #4
    Master Control Freak RussM's Avatar
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    With the default ATK programming, the low sensor controls the ATO operation (both start and stop), and the upper sensor is used solely as a safety cutoff. By removing the Set OFF, you made it so that ATO operation is initiated by the low sensor being open and stopped by the upper sensor, which resulted in either an overfill or with the ATK running too long and triggering the When statement to shut off the ATK & put the dashboard slide into the manual OFF position.
    Please do not send me PMs with technical questions or requesting assistance - use the forums for Apex help. PM me ONLY if the matter is of a private or personal nature. Thanks.

  5. #5
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    Quote Originally Posted by RussM View Post
    With the default ATK programming, the low sensor controls the ATO operation (both start and stop), and the upper sensor is used solely as a safety cutoff. By removing the Set OFF, you made it so that ATO operation is initiated by the low sensor being open and stopped by the upper sensor, which resulted in either an overfill or with the ATK running too long and triggering the When statement to shut off the ATK & put the dashboard slide into the manual OFF position.
    Ah—explains a lot. Thanks!


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