ATO is Full Programming for neptune apex w/ optical sensor

[Edwin1007]

Good morning, reefers,

I have a question that I’ve been looking online but can’t seem to find too much information about. I’m currently running Apex A3 Pro and using an optical sensor at the top of my ATO reservoir. I’m also using an ATO solenoid. What I want to do is once the optical sensor is triggered/ dry, to turn on the ATO solenoid, allowing flow also have the solenoid close when the optical sensor is triggered/wet and not turn back on for 12 hours. This is the programming Im running and it isn’t working.

ATOHI is the optical sensor in my reservoir

ATOHI closed is wet

ATOSolenoid:
Set ON
Fallback OFF
If ATOHI CLOSED Then OFF
Min Time 720:00 Then ON

 

[George03]

I dont know if this helps, but I ran it through perplexity for ya-


You’re very close; the issue is how Min Time works and the default state of the solenoid outlet.

Your current code:


text
ATOSolenoid
Fallback OFF
Set ON
If ATOHI CLOSED Then OFF
Min Time 720:00 Then ON

Why this doesn’t do what you want​

• Min Time 720:00 Then ON means: once the outlet turns ON, it must stay ON for at least 12 hours before it’s allowed to turn OFF.reef2reef+1
• You want the opposite: solenoid fills when the sensor is dry, then, once it turns OFF (full), it must stay OFF for 12 hours before it can turn ON again.
• Also, with Set ON, the default state of the outlet is ON (whenever no condition is true). For an ATO safety setup, you usually want it default OFF.

Recommended program​

For your described behavior (fill only when dry, and then lock out for 12 hours after it becomes wet):


text
ATOSolenoid
Fallback OFF
Set OFF
If ATOHI OPEN Then ON
Min Time 720:00 Then OFF
What this does:

• Set OFF – outlet is normally OFF.
• If ATOHI OPEN Then ON – when the reservoir sensor is dry (OPEN), turn the solenoid ON to let water in.
• If ATOHI becomes CLOSED (wet/full), that condition is no longer true, so the outlet wants to turn OFF.
• Min Time 720:00 Then OFF – once the outlet turns OFF, it must remain OFF for at least 12 hours before it’s allowed to turn ON again, even if the sensor goes dry again during that period.neptunesystems+1

Double‑check these details​

• Confirm in Fusion’s input tile that for your optical sensor:
  • CLOSED = wet, OPEN = dry (you’ve stated this, but verify by watching it while you move the water level).
• Make sure there are no other lines in that outlet’s program affecting ON/OFF.
• Test by:
  • Forcing the sensor to OPEN (dry) and watching the outlet turn ON.
  • Letting it go CLOSED (wet), verifying it turns OFF and stays OFF even if you then expose it (OPEN) again within the 12‑hour window.