About PLC
A programmable logic controller (PLC) or programmable controller is a digital computer used for automation of electromechanical processes.
Electromechanical processes are used extensively to control machinery in a wide range of activities and processes and include factory assembly lines, amusement rides, or lighting fixtures. The PLC is designed to accommodate multiple inputs and output arrangements as well as various temperatures, electrical noise, and resistance to vibration and impact. PLC memory is typically stored in battery-backed or non-volatile memory.
The PLC was invented in response to the needs of the American automotive manufacturing industry. Programmable logic controllers were initially adopted by the automotive industry where software revision replaced the re-wiring of hard-wired control panels when production models changed.
The first PLC was made by Bedford Associates in Massachusetts in the 1960’s. Bedford started a new company dedicated to developing, manufacturing, and selling, the PLC called Modicon which stood for MOdular DIgital CONtroller. One of the people who worked on that project was Dick Morley, who is considered to be the "father" of the PLC. The Modicon brand was sold in 1977 to Gould Electronics, and later acquired by German Company AEG and then by French Schneider Electric, the current owner.
The automotive industry is still one of the largest users of PLC devices.
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