PLC Programming for Beginners: Your First Working Project
PLC programming for beginners without the theory dump: pick a simulator, write a start/stop rung, add a timer and a counter, wire one HMI button.
plc basics
PLC Hardware Components and the Software That Uses Them
What is in a PLC rack and how the software sees it: power supply budget, CPU memory, I/O cards, tasks and routines, and tags against S7 addresses.
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