Outdoor Temperature Reset Example

[maurice]

I did an example of PID control the other day, here’s a link. If you have trouble you can post here.

PID control of VFD fan based on Static Pressure

Be sure to set up a trend log to watch the action over time, if you see short cycling loosen up the P term by making it larger (Big P = Lazy PID). Once you have the system fairly stable add some I term. The trend log is set up as follows. Add the items to be trended at Tab7 and set the trend interval at Tab8. Notice this device has no SD card so we’ll only be able to see trend logs from while T3000 is open on this trend. If we add an SD card the data will be logged to the SD card. The trend log…