基于PLC的五点同步起吊系统设计

In the process of large-scale antenna design, the antenna needs to be suspended and kept in different states or angles, for which the design on the five-point synchronous lifting system is proposed in this paper. The control system consists of a touch screen and two PLC slave computers. Touch screen as master computer, exchanges information with two PLC slave computers via the use of Ethernet communication. PLC controls the servo motor to drive the mechanical actuator movement by receiving and executing the master computer command to achieve the lifting of five points and the separate adjustment. Meanwhile, the settings of position, speed, lifting mode and other operating parameters and the real-time display of system status also can be achieved by touching the screen. In order to ensure the accuracy of the lifting system, the controller uses Modbus communication mode to communicate with servo driver to achieve the real-time feedback of the operating state information and the formation of closed-loop control. Also, a parameter conversion processing method is proposed to eliminating the lifting errors caused by the mechanical structure. Experiments show that the system is stable performance, safe and reliable, good interactivity, operability and other characteristics.