Time & Frequency Domain PID (800xA AC800M Connect)
1) How will I identify PID block is in time domain or frequency domain?
2) Is conversion from Time Domain PID to Frequency Domain PID or viceversa possible?
3) Any standard blocks are available?
There is no such thing as a "Time Domain PID" or a "Frequency Domain PID"
Time Domain and Frequency domain are mathematical "tricks" for describing the "output" response of a process to an "input" actuator change. You can use either method to describe the response depending on how you collected the data and what is easier for you to do. Both methods *should* give the same result. - ie a deadtime, a gain and a time constant for the plant.
You then apply a tuning rule to the results of your analysis to get PID tuning numbers.
If you ask 5 different engineers for the best tuning rules, you will get 15 different answers all qualified by "it depends".