PLC Memory Mapping and I/O addressing
A wise PLC programmer once told me that the ļ¬rst thing any aspiring programmer should learn about the PLC they intend to program is how the digital memory of that
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Basics of PLC Programming
In the late 1960’s an American company named Bedford Associates released a computing device they called the MODICON. As an acronym, it meant Modular Digital Controller, and later became the