Ladder Logic tends to represent how the control system would be configured if actual (real) relays were used.Ī PLC uses enhanced functions in software that represent the hardware equivalent. A PLC is flexible, and able to capture, process and output a broad range of I/O in a wide range of applications, including general Purpose I/O, analog data, remote communications and other forms time critical data.Ī PLC uses a language that is easy to learn and understand, usually based upon conventional " Ladder Logic " that predates the PLC itself. The initial inception of the PLC came from the automotive industry, in order to facilitate rapid product change-over.
My view of a Programmable Logic Controller ( PLC).Ī PLC is designed to be broad in its application.
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