With the help of a DCS these and other manufactures can efficiently coordinate adjustments in a top-down fashion using a centralized network of computers. Instructions from the DCS are deployed throughout a plant and fed to individual controllers. When configured appropriately the DCS can improve safety while also enhancing production efficiency.
A comparison of two plants may help to illustrate the importance of the DCS. First, imagine a small municipal waste water treatment facility that employs a dozen control loops. Next, imagine a large refinery that operates 10, highly dynamic and interacting control loops. While coordinating control at the treatment facility is relatively easy, the task of orchestrating control at the refinery can be overwhelming without the use of a DCS. While the DCS has traditionally been the only solution for achieving safe and efficient plant-wide control, advancement in processing capabilities has allowed the PLC to rapidly take on greater responsibility.
Break the Rules: A Hybrid Approach for Tuning Very Slow Processes Practitioners of every age know that tuning very slow processes presents a challenge when faced with rigid time constraints.
I m still a fresh graduate and it was a very helpful note though i have never worked with such system. But i have read for my interview purpose. Hope it will be a great help from the note u have shared in this page. Your email address will not be published. Notify me of follow-up comments by email. Notify me of new posts by email. Electrical Technology 13 8 minutes read.
Show More. Related Articles. F Improvement. I am electrical cable laying panel instrolation and control wiring Ht Lt controlling etc. Hope it will be a great help from the note u have shared in this page Thank you.
Leave a Reply Cancel reply Your email address will not be published. Check Also. What is a Thermistor? Types of Thermistors and Applications. Close Search for. Adblock Detected Our website is made possible by displaying online advertisements to our visitors.
Please consider supporting us by disabling your ad blocker. We depends on ad revenue to keep creating quality content for you to learn and enjoy for free. Control software typically resides embedded in controllers and performs basic control functions. Programming software, used to program and configure the various functions of the control system at startup, accounts for a small part of the total DCS software business. The DCS definition excludes optional supervisory software that performs production management MES and advanced control functions and typically resides in a supervisory DCS server.
Custom and specialty measurement equipment for these applications, such as profilers and vision systems, are not included.
Safety systems and emergency shutdown ESD systems are governed by their own set of rules and standards that are distinct from the area of process control and automation.
Safety system hardware, software, and services are excluded from the scope of this study regardless of their application. Means even if one system of unit fails other unit will not be disturbed without affecting the production.
A distributed control system DCS like plc but the controller elements are not central in location like the brain but are distributed throughout the system with each component sub-system controlled by one or more controllers. The entire system of controllers is connected by networks for communication and monitoring. A distributed control system DCS is a control system for a process or plant, wherein control elements are distributed throughout the system. This is in contrast to non-distributed systems, which use a single controller at a central location.
In a DCS, a hierarchy of controllers is connected by communications networks for command and monitoring. Generally, the concept of automatic control includes accomplishing two major operations; the transmission of signals information flow back and forth and the calculation of control actions decision making. Carrying out these operations in real plant requires a set of hardware and instrumentation that serve as the platform for these tasks.
0コメント