5. Discrete I/O vs Analog I/O


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In PLC systems, not all signals are the same.

Some signals are simple ON/OFF signals. Other signals represent a changing value such as pressure, temperature, tank level, speed, or weight.

That is …

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Analog Scaling Basics for PLC Technicians


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Turning Real-World Signals Into Useful Numbers

In PLC troubleshooting and programming, not every signal is simply ON or OFF.

Many devices send a variable signal that represents a real-world measurement, such as:

TemperaturePressureLevelFlowWeightValve …

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