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5:11 ص | Posted by
Eng. Mahmd Muhy |
Programmable logic controllers, also called programmable controllers or PLCs, are solid-state members of the computer family, using integrated circuits instead of electromechanical devices to implement control functions.
They are capable of storing instructions, such as sequencing, timing, counting, arithmetic, data manipulation, and communication, to control industrial machines and processes.Below figure illustrates a conceptual diagram of a PLC application.
They are capable of storing instructions, such as sequencing, timing, counting, arithmetic, data manipulation, and communication, to control industrial machines and processes.Below figure illustrates a conceptual diagram of a PLC application.
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| PLC conceptual application diagram |
Programmable controllers have many definitions. However, PLCs can be thought of in simple terms as industrial computers with specially designed architecture in both their central units (the PLC itself) and their interfacing circuitry to field devices (input/output connections to the real world).
As you will see later, programmable logic controllers are mature industrial controllers with their design roots based on the principles of simplicity and practical application.
see also PLC History and Future
see also PLC History and Future
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