ATO and KALK Programable Logic

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Originally Posted by Montireef

I tried this but found a problem: if pH equals setpoint nothing happens and after a while I get a Water1 alarm (because none of the sockets turn on). I need a way to set the condition: EQUAL

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Maybe this:

G1 = Water1 AND pH-value 1 Increase
G2 = Water1 AND pH-value 1 Decrease
G3 = pH-value 1 Increase NOR pH1-value 1 Decrease
G4 = Water1 AND G3
G5 = G2 OR G4

I would use either G1 or G5 to top off depending on pH value.

Is there any other easier way?

Sorry my mistake this won't work

Quote:

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Originally Posted by MabuyaQ

Sorry my mistake this won't work

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????

IMHO => original logic should work but don't use a water sensor with a alarm ( use always active ATO in the settings)

PS: PH EQUAL is not something that would work on something like ph you must keep hystersis in mind and that would fubar the logic if the ph was higher or lower .
<= or >= would be better options but could also confuse the controller is you use both

Quote:

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Originally Posted by Blahenazo

IMHO => original logic should work but don't use a water sensor with a alarm ( use always active ATO in the settings)

PS: PH EQUAL is not something that would work on something like ph you must keep hystersis in mind and that would fubar the logic if the ph was higher or lower .
<= or >= would be better options but could also confuse the controller is you use both

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Thanks Blahenazo.

I've tried with hysteresis with no success and I want to get the alarm message if anything goes wrong.

Quote:

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Originally Posted by Montireef

Maybe this:

G1 = Water1 AND pH-value 1 Increase
G2 = Water1 AND pH-value 1 Decrease
G3 = pH-value 1 Increase NOR pH1-value 1 Decrease
G4 = Water1 AND G3
G5 = G2 OR G4

I would use either G1 or G5 to top off depending on pH value.

Is there any other easier way?

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I've been searching for a solution for my pH/Top-off dilemma, and came across this thread!

This seems to work! :)
Will still have to observe a little more, but it looks very promising!
Thanks, Montireef!