PID Loop
In industry to control the process you need to use PID Loop There are mainly two typess of signal we use in industry as an analog signla one is 4-20mAmp sec is 0-10 volt these are the basic of PID Loop Now to program it you have to use one more thin and that is we called PID settings Mostly we use P: Propotional to the gain we need from 0~10 percent I: Integration is mostly 90~100 D: Differentional is mostly 0 These value may be change when your requirment are changes so itz may be a hit and try rule