Chapter 9

Closed-Loop Tuning
of Controllers
The tuning of process control loops can have a significant effect
on the variability and robustness of the control of a process system. This chapter teaches methods of tuning controllers while
they are running in automatic output mode, that is, closed loop.
The pattern recognition methods are highly effective.
Learning Objectives
When you have completed this chapter, you should be able to
1. Know the difference between a self-regulating process
response and an integrating process response
2. Understand the procedures and methods for tuning
controllers for self-regulating and integrating process
responses while the controllers are running in automatic
output mode
3. Recognize the desired response pattern when a step
change in setpoint is introduced to the controller
for a self-regulating process variable with optimum
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