Difference between revisions of "Distributed Control System"
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| + | ==== [[ISA|ISA-62443-1-1]] ==== | ||
| + | {{definition|Distributed Control System is a type of control system in which the system elements are dispersed but operated in a coupled manner. <ref name='ISA999'>[http://isa99.isa.org/ISA99%20Wiki/Master-Glossary.aspx ISA99 Committee Master Glossary - ISA-6443-1-1]</ref>}}<br/> | ||
| + | {{definition|Distributed Control System refers to control achieved by intelligence that is distributed about the process to be controlled, rather than by a centrally located single unit. <ref>[https://www.isa.org/store/products/product-detail/?productId=116135 The Automation, Systems, and Instrumentation Dictionary, 4th Edition, ISA, 2003]</ref>]}}.<br/> | ||
==== [[NIST]] ==== | ==== [[NIST]] ==== | ||
<big>DCS are used to control industrial processes such as electric power generation, oil refineries, water and wastewater treatment, and chemical, food, and automotive production. DCS are integrated as a control architecture containing a supervisory level of control overseeing multiple, integrated sub-systems that are responsible for controlling the details of a localized process. Product and process control are usually achieved by deploying feed back or feed forward control loops whereby key product and/or process conditions are automatically maintained around a desired set point. To accomplish the desired product and/or process tolerance around a specified set point, specific [[Programmable Logic Controller|PLCs]] are employed in the field and proportional, integral, and/or derivative settings on the PLC are tuned to provide the desired tolerance as well as the rate of self-correction during process upsets. DCS are used extensively in process-based industries. <ref name="NIST">[http://csrc.nist.gov/publications/nistpubs/800-82/SP800-82-final.pdf K. Stouffer, J. Falco, K. Kent, Guide to Industrial Control Systems (ICS) Security, NIST Special Publication 800-82, June 2011]</ref>. | <big>DCS are used to control industrial processes such as electric power generation, oil refineries, water and wastewater treatment, and chemical, food, and automotive production. DCS are integrated as a control architecture containing a supervisory level of control overseeing multiple, integrated sub-systems that are responsible for controlling the details of a localized process. Product and process control are usually achieved by deploying feed back or feed forward control loops whereby key product and/or process conditions are automatically maintained around a desired set point. To accomplish the desired product and/or process tolerance around a specified set point, specific [[Programmable Logic Controller|PLCs]] are employed in the field and proportional, integral, and/or derivative settings on the PLC are tuned to provide the desired tolerance as well as the rate of self-correction during process upsets. DCS are used extensively in process-based industries. <ref name="NIST">[http://csrc.nist.gov/publications/nistpubs/800-82/SP800-82-final.pdf K. Stouffer, J. Falco, K. Kent, Guide to Industrial Control Systems (ICS) Security, NIST Special Publication 800-82, June 2011]</ref>. | ||
Revision as of 15:34, 7 October 2017
A whole family of terms denote the accessing of measuring devices, automated analysis, human understandable display and interactive control, and the control of actuators, such as: Industrial Automation and Control Systems, Industrial Control Systems, Process Control Systems, Supervisory Control and Data Acquisition, and Distributed Control Systems.
Contents
Definitions
Standard Definition
Standard Definition
ISA-62443-1-1
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NIST
DCS are used to control industrial processes such as electric power generation, oil refineries, water and wastewater treatment, and chemical, food, and automotive production. DCS are integrated as a control architecture containing a supervisory level of control overseeing multiple, integrated sub-systems that are responsible for controlling the details of a localized process. Product and process control are usually achieved by deploying feed back or feed forward control loops whereby key product and/or process conditions are automatically maintained around a desired set point. To accomplish the desired product and/or process tolerance around a specified set point, specific PLCs are employed in the field and proportional, integral, and/or derivative settings on the PLC are tuned to provide the desired tolerance as well as the rate of self-correction during process upsets. DCS are used extensively in process-based industries. [3].
These systems are usually process control or discrete part control systems. A DCS uses a centralized supervisory control loop to mediate a group of localized controllers that share the overall tasks of carrying out an entire production process. By modularizing the production system, a DCS reduces the impact of a single fault on the overall system. In many modern systems, the DCS is interfaced with the corporate network to give business operations a view of production. [3].
