Instrumentation & Control Process


Instrumentation & Control Process Control Fundamentals


Instrumentation & Control Process
Instrumentation & Control Process 

 Control in process industries refers to the regulation of all aspects of the process. Precise control of level, temperature, pressure and flow is important in many process applications. This module introduces you to control in process industries, explains why control is important, and identifies different ways in which precise control is ensured.


The following five sections are included in this module:

  • The importance of process control
  • Control theory basics
  • Components of control loops and ISA symbology
  • Controller algorithms and tuning
  •  Process control systems

As you proceed through the module, answer the questions in the activities column on the right side of each page. Also, note the application boxes (double-bordered boxes) located throughout the module. Application boxes provide key information about how you may use your baseline knowledge in the field. When you see the workbook exercise graphic at the bottom of a page, go to the workbook to complete the designated exercise before moving on in the module. Workbook exercises help you measure your progress toward meeting each section’s learning objectives.



Table Of Contents


The Importance of Process Control

Control Theory Basics

The Control Loop

Process Control Terms

Components of Control Loops and ISA Symbology

Control Loop Equipment and Technology

ISA Symbology

Controller Algorithms and Tuning

Controller Algorithms

Why controllers need tuning?

Proportional Mode

Integral Mode

Derivative Mode

Process Control Loops

Single Control Loops

Examples Of Single Control Loops

Multi-Variable / Advanced Control Loops

Multivariable Loops

Feedforward Control

Feedforward plus Feedback

Cascade Control

Batch Control

Ratio Control

Selective Control

Fuzzy Control

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