The proportional-integral-derivative (PID) controller is the workhorse of the process industry. The modern PID has an extensive set of underutilized features often due to the lack of understanding of the role and possibilities. Here, we provide a concise summary of the options and parameters and how they can be used for process control improvement. We conclude with a step-by-step list of solutions in a unified methodology to get the most out of your PID controller. Since the PID can only be as good as the measurements and final control elements, the essential aspects of these components are included in the methodology.
The PID dates back about 100 years. For over 50 years, the PID ...