I'm fresh into System Identification and PID tunning. I have one muddy point before I get started.
So, what I understand so far is System Identification allows me to identifty a transfer function for a system given its measured controller input and output data. In my plant, I use PI ProcessDatabook that gives me controller output/input time domain data in (%). Do I need to convert the data to mA signals before importing to Matlab? Like 100% would be 20 mA and 0% would be 4 mA?