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06/11/2005, 06:24 AM
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#1 |
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Premium Member
 
Join Date: Apr 2003
Location: Raleigh, NC
Posts: 4,148
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Programming question - lower and upper limits
I don't want the fan to switch on and off too quick but i also don't want wide temp swings.
Will this be OK: If Temp > 79.5 Then FAN ON If Temp < 79.0 Then FAN OFF |
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06/11/2005, 10:34 AM
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#2 |
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ugust 2011
Join Date: Sep 2002
Location: brooklyn,ny
Posts: 2,793
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looks good to me...
__________________
Manhattan Reefs TOTM -August 2011 Current Tank Info: Elos crystal glass, Profilux network system, BK SM-250 |
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06/11/2005, 03:04 PM
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#3 |
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RC Sponsor
 Join Date: Aug 2001
Location: San Jose, CA
Posts: 4,311
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It should be fine.
Curt |
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06/11/2005, 04:56 PM
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#4 |
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Make my Funk a P-Funk
Join Date: Feb 2003
Location: Electric Avenue
Posts: 5,139
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Here is how I control mine.
If Temp > 79.6 Then FAN ON If Temp < 79.5 Then FAN OFF Max Change 010 M Then FAN OFF You can use the Max change command to eliminate rapid on/off cycling.
__________________
**************** "Work hard, rock hard, eat hard, sleep hard, grow big, wear glasses if you need 'em." -- The Webb Wilder Credo -- don't go ninjin' nobody that don't need ninjin'! Current Tank Info: 220g custom plywood. SPS heavy with Sequence Hammerhead return with 4-Way OM. Tunze 6100, 6200 and Wavebox. 5000btu DIY Chiller. Lighting is 10K mh 250W / VHO Actinic Skimer - H&S A200-2x1260 |
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06/15/2005, 08:47 AM
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#5 |
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Premium Member
Join Date: Apr 2003
Location: Raleigh, NC
Posts: 4,148
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mmmm it didn't work. I entered:
If Temp > 79.9 Then FAN ON If Temp < 79.7 Then FAN OFF Max Change 010 M Then FAN OFF But the fan is switching on and then off within a minute and then on withiin a minute and so on... |
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06/15/2005, 08:58 AM
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#6 |
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Premium Member
Join Date: Jun 2005
Location: Hypoluxo, Fl.
Posts: 1,012
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Double check and make sure max change is 010 M and not 001 M by mistake?
__________________
"I don't always know what I'm talking about, but I know I'm right!" -Muhammad Ali Current Tank Info: 180 Diamante Oceanic, 3 400w 10k Hammy's w/IceCaps, 2 140w URI super actinics, AC III Pro, 30g sump, 30g refug, 1/3hp chill, PM Skimmer/kalkreactor/calcium reactor/effluent, 2 Tunze 6060's, 2 Gorman Rupp 1115's, 25w UV |
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06/15/2005, 08:59 AM
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#7 |
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Premium Member
Join Date: Apr 2003
Location: Raleigh, NC
Posts: 4,148
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i did copy/paste so it's how it appears above
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06/15/2005, 09:47 AM
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#8 |
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RC Sponsor
Join Date: Aug 2001
Location: San Jose, CA
Posts: 4,311
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The Max change statement only effects either the on state or the off state - not both. So the Max Change statement above keeps the fan off for at least 10 minutes before it is allow to turn back on. There is no time constraint for the ON state.
Curt |
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