Why should DCS understand it separately from PLC? -Solutions - Huaqiang Electronic Network

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Q: dcs itself is instrument control and computer monitoring such as plc. Why do people often ask these two things? Is there a difference?

A: Because the two systems were different initially.
PLC has been developed from relay control, and it is mostly used for logic control, such as control of factory processing equipment, and multi-switch control.
The DCS is developed from the instrumentation system and is mainly used for process control, like the control of the chemical industry, and the detection and control of multiple analog quantities.
However, with the development of technology, the difference between the two is getting smaller and smaller, and the hardware is now basically homogenized.