Programmable Logic Controller was developed by a group of engineers at General Motors in 1968, when the company were looking for an alternative to replace complex relay control system.
Every system or machine has a controller. Depending on the technology used, controllers can be divided into pneumatic, hydraulic, electrical and electronic controllers.
A digitally operating electronic system, designed for use in an industrial environment, with uses a programmable memory fot the internal storage of user oriented intructions for implementing specific functions such as logic, sequencing, timing, counting and arithmatic, to control, through digital or analog inputs and outputs, various types of machines or processes. Both the PC and its associated peripherals are designed so that they can be easily integrated into an industrial control system and easily used in all their intended functions.
Every system or machine has a controller. Depending on the technology used, controllers can be divided into pneumatic, hydraulic, electrical and electronic controllers.
A digitally operating electronic system, designed for use in an industrial environment, with uses a programmable memory fot the internal storage of user oriented intructions for implementing specific functions such as logic, sequencing, timing, counting and arithmatic, to control, through digital or analog inputs and outputs, various types of machines or processes. Both the PC and its associated peripherals are designed so that they can be easily integrated into an industrial control system and easily used in all their intended functions.
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