Loose Leaf for Programmable Logic Controllers
Loose Leaf for Programmable Logic Controllers
5th Edition
ISBN: 9781259684739
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
Question
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Chapter 10, Problem 22RQ
Program Plan Intro

Proportional Integral Derivative (PID) control:

  • The PID control refers to a feedback control method.
  • It performs the combined actions of proportional, integral, and derivative controls.
  • It is one of the most widely used process controllers.
  • The PID control is used to maintain a process variable within the limits of a specified set point. These process variables can be temperature, flow, level, or speed.
  • It also allows the control process operations to take place outside the Central Processing Unit (CPU), which in fact, greatly reduces the additional burden of CPU.

Explanation of Solution

b.

Set-point:

  • Set-point is a component of closed-loop control system and abbreviated as SP...

Explanation of Solution

c.

Error:

  • When the controller gets information from field transmitter, the controller compares process variable with set-point and takes decision base...

Explanation of Solution

d.

Control variable:

  • Control variable refers to the output obtained from the controller loop.
  • It is connected to the controlling part of the process...

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