Is program correct?

[svb57]

Here is a simple program will it work?

If Time > 12:00 Then LT1 ON :main lights on
If Time > 22:00 Then LT1 OFF :main lights off
If Temp > 84.0 Then LT1 OFF :if temp to high lights off
Max Change 030 M Then LT1 ON :lights off for 30 then back on

If Time > 12:00 Then LT2 ON :main lights on
If Time > 22:00 Then LT2 OFF :main lights off
If Temp > 84.0 Then LT2 OFF :if temp to high lights off
Max Change 030 M Then LT2 ON :lights off for 30 then back

If Time > 12:00 Then LBT ON :main lights on
If Time > 22:00 Then LBT OFF :main lights off
If Temp > 84.0 Then LBT OFF :if temp to high lights off
Max Change 030 M Then LBT ON :lights off for 30 then back

If Temp > 81.0 Then COL ON
If Temp < 80.5 Then COL OFF
If Temp < 79.5 Then HET ON
If Temp > 80.0 Then HET OFF
If Time > 00:00 Then ALM OFF
If Temp > 83.0 Then ALM ON
If Temp < 78.0 Then ALM ON
If Power 000 Then ALM ON

[kenargo]

You can make the program a bit more efficient if you would like. Since all 3 lights are on/off at the same time you can change to this:


If Time > 00:00 Then LT2 OFF
If Time > 00:00 Then LTB OFF


If Time > 12:00 Then LT1 ON :main lights on
If Time > 22:00 Then LT1 OFF :main lights off
If Temp > 84.0 Then LT1 OFF :if temp to high lights off
Max Change 030 M Then LT1 ON :lights off for 30 then back on

If Timer LT1 = ON Then LT2 ON
If Timer LT1 = ON Then LTB ON

You should have a Max Change for your chiller. Trying to hold the tank to +/- 1F could end up short cycling your chiller and this would quickly damage the compressor. Have a Max Change for 'off', maybe 5 min.

One last suggestion; include 'just in case' conditions, for example:

If Temp > 86 Then COL Off
If Temp < 76 Then HET Off

This will protect in case the temp probe fails.

Oh, and you could test the program using my simulator and see if it works the way you expect.

[svb57]

Thanks.......

I dont have a chiller the COL is to turn the two main fans on over the tanks......

Jim Mc

[ShadowViper]

With the temp setting for my fans I also use a -

If Timer VHO = ON Then FAN ON

This turns on the fans with my lights.