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Great forum! I have a process I need to controls that "drifts" over time and I am not sure if a PID control will be able to compensate. By drift, I meant that the amount of energy, required to maintain the setpoint varies over time i.e. like maintaining the level in a tank with a small leak...

I thought I would share some information I received from one of the PID temperature controller manufacturers: Any given PID set is good for @ +/- 200? from its tuning point. Only if you exceed this should you consider using another PID set. Some controllers have a feature called Gain...

FeX32: It is certainly not my intention to disregard proper control engineering analysis. That is in fact why I posted the question - to solicit advice and guidance. In the spirit of this forum, perhaps you could point me to some literature or tutorials on "proper control engineering...

FeX32: Elementary? What is your recommended approach when the criteria is one "user interface", in this case LabVIEW?

danw2: Sory, but I replied earlier and it did not seamt to post. Thanks for the tip on the various PID methods. As for changing brands - the LabVIEW will certainly need to have a lower level custom "driver" for any new controller that is introduced. The goal behind this design is that my end...

danw2: Thanks for the note on the different PID types. Good point. I can look into it but think that this will get flushed out in my testing. As for the to swapping controllers, I will need to write a lower level "driver" in the LabVIEW code for each new controller. The end result is that the...

Thanks everyone. Some comments to your replies: analogkid2digitalman: I am aware that there are numerous PID based ramp/soak controllers available. The goal is to have everything monitored and programmed from a common front end using LabVIEW. This will also allow us to subsitute the PID...

Hey everyone, I have a 1/16 DIN temperature controller with a single setpoint with remote communications. I have written a simple time based program for ramping and holding (soak). The program basically just resets the setpoint periodically in order to achieve the desired temperature based on a...