ALL IN ONE PLC LEARNING EBOOKS
Automation of many different processes, such as controlling machines or
factory assembly lines, is done through the use of small computers
called a programmable logic controller (PLC). This is actually a
control device that consists of a programmable microprocessor, and is
programmed using a specialized computer language. Before, a
programmable logic controller would have been programmed in ladder
logic, which is similar to a schematic of relay logic. A modern
programmabl logic controller is usually programmed in any one of
several languages, ranging from ladder logic to Basic or C. Typically,
the program is written in a development environment on a personal
computer (PC), and then is downloaded onto the programmable logic
controller directly through a cable connection. The program is stored
in the programmable logic controller in non-volatile memory.
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