ATO Duration Timer

BigEZ · Post by **BigEZ** » Wed Apr 10, 2013 7:52 am

Hi Everyone, I'm new to coding and was wondering if anyone might have a solution to my problem. My ATO float switch is horribly sensitive. It seems like it gets into a pattern of clicking the relay on and off every couple seconds. Its not long enough to pump water into the sump so it repeats that cycle pretty much indefinitely.

My question is, does anyone have a piece of coding that would allow a timer function to trigger when the low float switch is activated and run my pump for say 10 seconds uninterrupted? Or any other solution to solve the issue whether it be coding or hardware help would be greatly appreciated.

I'm on my work computer right now, but i'll post my PDE when I get home if anyone needs it.

Thanks!

rimai · Post by **rimai** » Wed Apr 10, 2013 7:58 am

If you use the StandardATO, you wouldn't have this problem.
Is starts when the bottom one triggers and only stops when to top one triggers.
http://forum.reefangel.com/viewtopic.php?f=7&t=240

BigEZ · Post by **BigEZ** » Wed Apr 10, 2013 8:08 am

Interesting, I am using the StandardATO. I'll have to check when I get home but after reading that i'm pretty sure it's a hardware issue.

Let me ask you, if I had the upper float switch reversed somehow would it create the type of scenario I described in my OP?

Thanks for the link Roberto.

rimai · Post by **rimai** » Wed Apr 10, 2013 8:17 am

I think it would.

Smotz · Post by **Smotz** » Thu Apr 18, 2013 12:38 pm

Question - is there any way to build in a redundancy here should one of these switches fail?

lnevo · Post by **lnevo** » Thu Apr 18, 2013 1:01 pm

There are two options. The StandardATO does have redudnacy via a timeout. So you can set the timeout to the max time the pump will be on for. If one of the switches fail, the ATO will be disabled after the time is exceed.

The second method is to set the ATO to use one switch and if the other switch gets activated to shutdown.

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