Industrial Process Control
Instrumentation Skills
Course 1 – Single Loop Control
Prerequisites: This lesson is designed for participants familiar with measurement fundamentals. An understanding of algebra is also recommended.
Description: This lesson presents the principles of single-loop control and the applications of feedback control in the industrial environment. Also introduced are various control modes including on/off, proportional, integral, and derivative control.
Objectives:
- Define and site industrial control
- Define process variable
- Compare manual and automatic process control
- Adjust the set point on a pictorial representation of an industrial controller
- Identify the controlled, measured, and manipulated variables of a heat exchanger system
- Define deviation
- Identify the system response for various control modes
- Define load change
- Identify the elements of process control
- Identify the action of the final control element of various control systems
- Identify the dead zone or dead band on an on/off control response curve
- Compare and contrast the action of a final control element in an on/off control
- System with a proportional control process
- Identify reverse- or direct-acting control with an example of measurement and subsequent output response
- Define proportional control in relation to response error
- Determine the setting of the controller’s proportional band and gain on a pictorial representation of process control action
- Identify offset on an example of proportional only control
- Define integral control in relation to error signal
- Identify minutes per repeat and repeats per minute with an example of the units used in integral control
- Define reset wind-up on a process response curve for an integral controller
- Identify the effects of reset wind up on the elements of process control on a heat exchange system
- Define derivative process control in relation to error signal
Course 2 – Multiple Loop Control
Prerequisites: This lesson is designed for participants familiar with single-loop control. An understanding of pressure, temperature, level, and flow measurement as well as basic algebra is also recommended.
Description: This lesson explains the application of multiple-loop control strategies to industrial process control systems. The lesson also explains the operation of several types of digital process control systems.
Objectives:
- Identify the benefits of advanced process control strategies
- Compare feedback and feedforward control
- Explain the principles and applications of a feedforward control system
- Explain the principles and identify the benefits of cascade control
- Discriminate between wild and controlled flows in a ratio control system
- Explain the principles and applications for ratio control
- Explain the principles and application of adaptive and selective control
- Identify the method of process control used in direct digital, supervisory, and distributed control systems