Voices: Dan Hebert

IT invades controller programming

Languages and standards borrowed from IT are being used for controller programming and IoT integration

By Dan Hebert, PE, contributing editor
Sep 8, 2016

Since the invention of the PLC in the 1960s, ladder logic has been the language of choice for programming PLCs. Ladder logic was based on control system diagrams for relay- and timer-based systems and was thus not ideal for solid-state PLCs driven by software programs, but it was first to market among all of the PLC languages and has established a solid foothold.

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