Discuss Need Help Programming Neptune Liquid Level Sensor (LLS) (1 Viewer)

[gregg]

hey ya'll, hoping someone can help me. I'm missing something in this coding.

My goal here is to turn on a pump to refill my ATO tank when my Liquid Level Sensor (LLS) shows the level is below 3". Ive named the LLS - "L-ATO".
Then... I want it to stay on till the L-ATO is at 8.5" and then shut off. I put "When On > 030:00 Then OFF" just in case something fails so it doesn't stay on any longer than 30 minutes.

Here is my issue: Currently when my L-ATO gets below 3" it turns on as expected but then as it fills up and becomes greater than 3" it shuts back off, resulting in the pump constantly coming on and off at that point as it drops less than, and then greater than 3".

I assume my issue comes from the first 2 lines of code here but not sure... can someone give me some advice? I'd be grateful.

Here is the code i'm currently using.

Fallback OFF
Set OFF
If L-ATO < 3.0 Then ON
If L-ATO > 8.5 Then OFF
When On > 030:00 Then OFF

 

[foos]

This is what I use with two optical sensors. I think the Set OFF may be what is getting you. I sorta remember having an issue like that but it has been forever.

Fallback OFF
If atobot OPEN Then ON
If atotop CLOSED Then OFF

 

[foos]

Basically, I think these are read on a never ending loop so when L-ATO is >3.0 it no longer matches that condition so it goes to the Set above it.

 

[gregg]

So basicly your saying to remove “Set OFF” from the code I posted above? I’m lost.

With the LLS there is no “open” or “closed” it’s either greater than or less than.

 

[soymilk]

This is my code

Fallback OFF
If Rtnlvl < 5.5 Then ON
If Rtnlvl > 6.0 Then OFF
Defer 000:30 Then ON
Min Time 005:00 Then OFF

 

[Cody]

This is my code

Fallback OFF
If Rtnlvl < 5.5 Then ON
If Rtnlvl > 6.0 Then OFF
Defer 000:30 Then ON
Min Time 005:00 Then OFF

I think that defer line is the missing piece for Gregg's situation.

 

[gregg]

Ok thanks everyone … it was the code “set OFF” that was jacking things up. You don't use a “Set” when trying to refill a container using low & high sensors or low & high LLS readings… unlike an optical switch.

 

[Cody]

Ok thanks everyone … it was the code “set OFF” that was jacking things up. You don't use a “Set” when trying to refill a container using low & high sensors or low & high LLS readings… unlike an optical switch.

Well this is good info. I'm going to set mine up soon. Thanks for solving this!

 

[foos]

The Defer is for setting a timeout for starting it. Helpful for skimmers, hit feed, slow pumps and stop skimmer, feed ends pumps start back up but skimmer is deferred for xmin to let levels stabilize.