RT & PID Auto-Tuning.vi

[aSquared]

Hi,

I use LV 8.2.1 DSC RT.

I want to control 4 different loops of PID.

and since the conditions in the system are changing,

I would like to use Auto-Tuning, so the gain will be appropriate.

just that, I can't use it on RT.

there is this Auto-Tuning Wizard included that can't work with RT.

Is there a VI of Auto-Tuning that can work RT ?

Also, I would be glad to get

1. Advices regarding the architecture recommended with PID control of 4 different loops,

2  Information about PID control  (with LabVIEW of course)

Regards,

Amitai Abramson

[aSquared]

I can see that  - Angelantoni had the same problem, but no solution ?

http://forums.ni.com/ni/board/message?board.id=280&view=by_date_ascending&message.id=1163#M1163

[Ben]

THe PID Control Toolset User Manual can be found here.

The Auto-Tune can be used to if you Open the FP of the VI that is running on the RT target. This will let you get some preliminary numbers provided the system is linear.

Re: Architecture

I will generally set up a sepearte loop to control each PID loop. I will keep an Action Engine updated with the current PV being controlled and yet another Action Engine to allow the PID gain schedule to be adjusted on the fly. The approach to sharing the PID gain schedule allows me to (using VI Server) update the PID from a PC while the RT ap is running.

Just trying to help,

Ben

[kc64]

I have the same problem.  When I try to auto tune my cRIO controller, I get a popup box that shows an error.  My VI front panel is open when I select to auto tune.

Any ideas?

[Joe D.]

Hi Kc64,

Could you post a snippet of your block diagram. The error is with a property node which is strange. Perhaps the snipnet will tell us more.

[kc64]

Actually, I learned that the auto tuning wizard does not run on RT.  Too bad. 😞