This article is a practical PLC programming guide covering the five IEC 61131-3 languages, the scan cycle that governs how your code actually runs, ladder and structured text examples, and the mistakes that cost engineers the most commissioning time.
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This article explains what is a PLC, what's inside it, how the scan cycle works, which programming languages the current IEC standard defines, and how to choose the right controller for your application.
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Design, wire, protect, and troubleshoot motor starting systems.
