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-   -   P.I.D is more of a P.I.T.A - Help with auto tune anyone? (http://www.homebrewtalk.com/f235/p-i-d-more-p-i-t-help-auto-tune-anyone-376668/)

tophmck 12-29-2012 06:40 PM

2 Attachment(s)
Quote:
Originally Posted by JonClayton View Post
Top, good question. A friend wired up the controller for me. I will check it out when I am home this evening and report back.
OK. From the behavior you describe above, my guess is that the gas valve is currently hooked up as if it were an SSR (terminals 6 and 7). But the manual says that for outy=0 mode, "Relay J1 and J2 as Alarm outputs; SSR Disabled, normally used for upper/lower limits alarm trigger control". In other words, you want to hook up the gas valve to J1 (terminals 4 and 5 – see the attached terminal assignments below).

Also, it sounds like you might be trying to set your desired temperature using SV. But you're using the J1 relay to fire your burner (effectively the burner is a low temp alarm), so you need to use AL1 and AH1 to set the desired temperature. Note that AH1 is the temperature you want the burner to fire at and AL1 is the temperature at which it should turn off. (See the attached Figure 5 below.) Note that AL1 must be higher than AH1.

So, just as an example, if you want to maintain a mash temp of 152, you might try setting AH1 to 151 and AL1 to 153.

Good luck!

tophmck 12-29-2012 06:40 PM

2 Attachment(s)
Quote:
Originally Posted by JonClayton View Post
Top, good question. A friend wired up the controller for me. I will check it out when I am home this evening and report back.
OK. From the behavior you describe above, my guess is that the gas valve is currently hooked up as if it were an SSR (terminals 6 and 7). But the manual says that for outy=0 mode, "Relay J1 and J2 as Alarm outputs; SSR Disabled, normally used for upper/lower limits alarm trigger control". In other words, you want to hook up the gas valve to J1 (terminals 4 and 5 – see the attached terminal assignments below).

Also, it sounds like you might be trying to set your desired temperature using SV. But you're using the J1 relay to fire your burner (effectively the burner is a low temp alarm), so you need to use AL1 and AH1 to set the desired temperature. Note that AH1 is the temperature you want the burner to fire at and AL1 is the temperature at which it should turn off. (See the attached Figure 5 below.) Note that AL1 must be higher than AH1.

So, just as an example, if you want to maintain a mash temp of 152, you might try setting AH1 to 151 and AL1 to 153.

Good luck!


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