Transferfunction as a plant process control parameter

[danil33]

Hello,

         Below attached is a pid controller.In that I used a sub VI  of a tranferfunction for control.But there showing some errors.Can anyone plz suggest the input and output of that sub VI.Can we make it as a working one.plz help.

[su_a]

Include the subvi. how do we run your code?

Be specific. What are the errors it is showing? What does your code do?

[danil33]

Hope you can see the sub VI named TrFn in the blockdiagram.The VI works good when we use Transferfunction module(H(S)) in control and simulation toolkit.But Iam trying to use my own TrFn subVI.Is it possible???

Thanx

[su_a]

I have searched a bit and I dont think you can.

But why do you need that? you can configure the transfer function subvi itself according to your system needs.

If there are too many feedforward/ feedback loops just create the block diagrams adding/subtrating transfer function wherever necessary.

I found these links helpful

https://decibel.ni.com/content/docs/DOC-20631

http://zone.ni.com/devzone/cda/tut/p/id/6931

this is a bit detailed, just see the pid part

http://home.hit.no/~hansha/documents/labview/training/Control%20and%20Simulation%20in%20LabVIEW/Cont...

[danil33]

I just tried to use my own sub VI as a part of my study.

Thanx.