Transcription of HistoryofControl HistoryofPLCandDCS - Automatic …
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HistoryofControl HistoryofPLCandDCS - Automatic …
History of ControlHistory of PLC and DCSV anessa Romero Segovia and Alfred Theorin2012-06-15 (minor revision 2013-07-26)1 IntroductionThe way many industrial processes look today, is the result of manyyears ofresearch and hard work of people commited to improve their functionality, man-agement, and organization. One could recall the phrase necessity is the motherof invention , and certainly this would fit the everyday work of control engineersand technicians working in industrial processes during the 50 s and 60 s. Thisnecessity was the origin of devices such as the Programmable Logic Controller(PLC) and the Distributed Control System (DCS).2 Programmable Logic Controller (PLC)A programmable logic controller (PLC) is an industrially hardened computer-based unit that performs discrete or continuous control functions in a variety ofprocessing plant and factory environments.
1 Introduction The way many industrial processes look today, is the result of many years of research and hard work of people commited to improve their functionality, man-
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