Principle of electric control system for automatic stacke

  The principle block diagram of the electrical control system of the full-automatic palletizer is shown in the figure: it is composed of central processing unit plc-cpu and its I / 0 expansion unit, detection unit (photoelectric switch, proximity switch), operation and display unit (touch screen, button switch and indicator light), control elements (AC contacts, frequency converter and solenoid valve) and actuating components (motor and cylinder)
As the operation interface of equipment operation, the operation and display unit receives the operation instructions from the operator and indicates the operation state of the equipment; The detection element detects the position status of bags, pallets and pallets and the operation status of each unit
PLC automatically scans the current status of each input and output point, updates the status of the output point according to the logic relationship determined by the program, and controls the start and stop of the motor and the action of the cylinder by turning on and off the AC contactor and solenoid valve, so as to complete the control of the whole process of palletizing

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