Programmable Logic Controller (PLC) is a kind of digital operation electronic system specially designed for application in industrial environment. Now, PLC is widely used in various open-loop control, analog closed-loop control, digital control and data acquisition monitoring system.
For large automation control system, it’s an integrated system combining HMI PLCs. In such system, HMI works as a versatile operation and monitor platform to display working status of the equipment, allow users to input data and operation, and link to a variety of industrial control equipment.
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