Dear members,
I need some serious help on PID tuning. I spent a lot of time online and on YouTube.
First off, i am not an expert. I was introduced to control couple years ago however i have never done tuning. Please bear with me. I have attached a trend and a compiled info on steps to go through the tuning loop.
1- The first step is to check the physical controller. I did that with I&E supervisor. checked out
2- Do a bump test in Manual. This is where my problem started. The measurement is Up and Down. It never on SPT. Please see the attached trend. I just don't want to move numbers around just for the sake of changing them.
The help i am seeking may be out of scope of this forum. i need an expert to hold my hand on this one. My loop is a cascade loop. The output of my pressure controller feed into my temperatures controller. I am using a Foxboro I/A series 6.5.6. Any documentation will help. I checked with Foxboro they told me there are training courses for this but management does not want to pay for it yet so i need to figure this on my own. Any help, documentation ect...
Thank you,