The three PLC application field profile - — Switch, process control, motion control logic and order

If the application type, application of programmable controller has the following three types: ( 1) Switch logic and sequence control: this is the control function of the programmable controller is the most basic, the most widely used in industrial situations and can replace the relay control system. Switch logic control not only can be used for a single device, and can be used in the production line. ( 2) Process control: PLC controller through the analog I/O modules, can be continuous changes such as temperature, flow, pressure analog control. Large and medium-sized PLC controller with PID closed-loop control functions and is widely used in electric power, chemical, mechanical, metallurgical and other industries. ( 3) Can be used in motion control, PLC controller control of the straight line or circular motion, such as CNC machine, robot, metal processing, elevator control, etc.
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