Fundamentals of Distributed Control System (DCS)

At one time, taking the thousands of pieces of information in a plant and displaying it on some kind of information system was a real challenge and in fact, impossible. With the development of Distributed Control Systems (DCS) it is now easy to take all the information and organize it in a hierarchical system.

DCS displays information on a computer and allows process operators to run the process, making the process information available to other people in the plant. Once the DCS converts the process information to personal computer language, it can be distributed to everyone on the plant site and to other parts of the organization that may be located anywhere in the world.

In this course participants will learn about the main characteristics of the DCS systems. They will become familiar with the DCS hardware and how it is connected together to make up the basis of the DCS. Once the hardware is installed and tested, the participants will learn about programming the DCS software. Once the software is configured the participants will become familiar with the DCS accessories, such as alarm and data reporting systems.

This lesson provides an understanding of the fundamentals of Distributed Control Systems (DCS). The evolution of computer control systems is discussed and the architecture of contemporary DCS is described in detail. The lesson covers hardware, configuration, data communications, user interface and 1/0 devices.

This course is mainly targeted to instrumentation technicians working in the field as an introduction or refresher. The course can be applicable to technicians working in other disciplines, equipment purchasers, procurement and storage personnel, job planners, and immediate supervisors.

This lesson is designed for participants familiar with process operations, digital electronic theory, and test instruments and devices.

Certificate

• Describe direct digital control
• Describe a supervisory control system
• Identify an advantage of supervisory control over direct digital control
• Describe a Distributed control system
• Identify the advantages of DCS
• Identify some of the control functions of a distributed control system
• Explain DCS terminology
• Explain hardware requirements for distributed control systems
• Describe how control loops are implemented in a DCS
• Explain communications between modules and external devi
• Describe two types of data transmission
• Explain how signal integrity is maintained
• Define system interfacing
• Define communication protocols and their function in data transmission
• Name two primary types of human interface
• Describe DCS input devices and describe types of available displays

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