Thursday 22 December 2016

Analogy to understand Distributed Control System

DISTRIBUTED CONTROL SYSTEM, THE CONCEPT

Distributed control systems (DCS) use decentralized elements to control distributed processes or manufacturing systems specifically continuous process operations. Advantages of DCS are as follows:

· Flexibility

· Equipment long life

· Further modification and improvement in the plant

· Centralized maintenance

The basic idea behind DCS is that there are multiple controllers within the industrial plant and are connected to the central intelligence system through industrial network protocol as per the requirement and other constraints. DCS enables the engineer to control, monitor and report of every individual component or process from a central location.

Redundancy elements are necessary in DCS as to avert any dangerous situation in which we don’t like compromise with safety of life and infrastructure within the plant. Reliability of the system improves as a byproduct of adding redundant components.

DISTRIBUTED CONTROL SYSTEM, THE ANALOGY

Consider an engineering college, where the Director is responsible to run the whole college. Not let us assume that there no head of the departments in the college or if there are heads but they don’t have any administrative power.

Now in this case if any student wants a leave or has any issue on that specific day when Director is not available in the college and Director has also not nominated any other person like Dean or Deputy Director in his absence to work as an acting director, then the student will not be able to get his leave technically.

But if Director has appointed the heads and also has given the rights to exercise administration within their role then there will be no problem of any kind related to administration.

Similarly in DCS as mentioned above, there are multiple controllers within the industrial plant and are connected to the central intelligence system through industrial network protocol as per the requirement and other constraints.

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