The PLC: a logical development

Walker, Mark; Bissell, Christopher and Monk, John (2010). The PLC: a logical development. Measurement and Control, 43(9) pp. 280–284.

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Abstract

Programmable Logic Controllers (PLCs) have been used to control industrial processes and equipment for over 40 years, having their first commercially recognised application in 1969. Since then there have been enormous changes in the design and application of PLCs, yet developments were evolutionary rather than radical. The flexibility of the PLC does not confine it to industrial use and it has been used for disparate non-industrial control applications . This article reviews the history, development and industrial applications of the PLC.

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