Best tuning parameters to start with

[Imran.Idris]

Can any body tell me?
What are the best parameters in terms of Proportional, Integral, & Derivative parts, when we are going to tune a controller for the first time using trial & error method.
Please elaborate specifically for
1) Level controllers
2) Pressure controllers
3) Temperature controller

[sameenkhan]

Hi Imran,

Please see attachement...

Hopefully it'll solve your problem..

Regards,
Sameen

[Imran.Idris]

thanks Sameen

[ali.abbas]

Imran, you even get softwares to predict optimum tuning constants now. I assume that can make life pretty easy in most cases.

[Imran.Idris]

thanks can you refer any of these softwares?

[nabeelhassan]

Well the loop tuning software require you to provide ample data points of the loop you are trying to tune from your DCS either via a csv file, an excel file or an OPC of some kind. On the basis of the data points, it creates a Transfer Function of your particular loop and recommends Optimized Loop Tuning Parameters.

We are in the process of getting a similar Software for our plant. The ones which we explored were: Inca PID Tuner and Honeywell's LoopScout
The former is purely a tuning software whereas the latter is sort of a mini APC (advanced process control) which can be embedded with Honeywell DCS esp Experion.
I would strongly recommend you to go through the websites of the aforementioned Software.