New user wishlist

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I am very new to the T3 series of controllers (2 days new). I have been in building automation for about 25 years mainly working with Johnson Controls, Honeywell, and EasyIO. I purchased a T3-BB the other day and just got it yesterday and have a few things I’d like to see.

1.) Auto-tuning PID loops would be great but maybe that’s asking too much.

2.) For the existing PID loops I’d like to see a “rate limiter” of some type. In testing the PID loops on the T3-BB I see times when the loop make significant jumps so I’d like to see something that would limit how quickly the output could change either upward or downward. It would also be great to have those rates adjustable.

3.) I would like to see adjustable PID loop outputs and not be limited to 0-100. I would like to see ranges from -100 to 200 at least.

4.) Most all of my programming involves PID loops and wind-up can be a real problem. The PID’s should be smart enough to know once they’ve hit 100% or 0% that the influence from the integral action would be stopped without sending the loop to 0%.

5.) I would like to see the “Programming” screen give live data feedback. I other words, when I’m looking at line in programming, It would be nice to see the value of each I/O and variable. Maybe in parentheses next to the object. As an example in the lines below, if the parentheses had the actual live values it would be very helpful.
10 SF_SPD (xx) = PID2 (xx) * SF_S (xx)
20 IF OCC_MODE(xx) AND NOT LT_A(xx) THEN START SF_C(xx) ELSE STOP SF_C(xx)

It’s only day two for me so I lack any significant know on this product but my initial reaction is that I can’t use this product to replace one of my CGM or Spyder controllers but I hope that will change as I get more comfortable with it. Just an initial observation.

Thanks

2

  1. Auto tune, been on the drawing board a long time I admit. Well bump it up a notch.

  2. PID Rate limiter: Changing how the PID works… makes it not a PID anymore right. You can show me what your are used to seeing, perhaps send on a user manual for your usual environment and we’ll see what we can come up with. A workaround might be to create two PIDs and use some logic to switch between the two.

  3. Expand the range of the PID: You could do this in the control basic, VAR1 = -100 + 3 * PID1

  4. Limit PID windup: I agree windup is nasty and I am pretty sure we have a limit on it. I will check with the team and report back here.
    Update: Confirmed, PID is limited and clipped at exactly 100%.

  5. Programming Help: Move the cursor to the item of interest and hit the insert key, a popup with the value shows up. Been thinking of some help using hover text, will make a note to our team about that.

Thanks for your feedback, keep it coming. We want to make the product as good as the big guys and better. If we’re missing something I want to hear about it.

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