Design of PLC Control System for Automatic Door
The core of automatic door is its control system. The basic principle of au tomatic door control system is to use PLC to output digital signal and analog signal to inverter to change working power frequency and drive motor steering, drive motor frequency conversion, change direction operation, drive automatic door to realize door opening and closing operations at different speeds. When the signal acquisition device of the automatic door detects whether a person or an object has passed, the automatic door can be automatically opened and closed to realize the function of the person coming to the door and the person to close the door. The system designed in this paper not only completes the opening and closing of the automatic door at different speeds under different conditions, but also adds more safety protection, such as anti pinch control, emergency stop and system fault self test, to achieve the expected design effect. The automatic door control system has the characteristics of higher safety, ease of use and stability.