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This is a full build-along tutorial that goes beyond the Bob Teaches Tech YouTube video. It covers the hardware, wiring,...
SCADA, HMI, and PLC get used almost interchangeably in job postings and casual shop-floor conversation, but they aren't competing technologies,...
Learn how to connect a 24V DC photoelectric sensor to an AC timer relay using an interposing relay. Complete wiring...
Inductive, capacitive, and photoelectric sensors all answer the same basic question, is something there?, but they sense completely different physical...
SCADA lets a single operator monitor and control equipment spread across an entire plant, pipeline, or utility network — here's...
Arduino digital I/O explained: pinMode, digitalRead, and digitalWrite with a tested button-and-LED wiring and code example.
Structured text (ST) is the IEC 61131-3 language that feels most familiar to anyone with a Pascal or C background...
Modbus register types explained: coils, discrete inputs, holding and input registers, function codes, and addressing conventions.
Step-by-step guide to connecting a PLC to SCADA over Modbus TCP, including port 502 setup and a troubleshooting table.