设计了一个基于PLC的智能立体车库系统，系统由泊车位、转盘换位装置、汽车定位装置和升降电梯组成。控制采用西门子S7-300PLC作为主站，两个S7-200PLC作为从站，通过以太网的形式进行组网，并采用MCGS作为人机交互界面，通过控制伺服电机、步进电机、变频器、普通三相异步电机来实现对电梯门的开关、电梯的升降、汽车固定的伸缩支架电机、支架的夹紧电机、转盘旋转的更换车位电机等控制，达到智能立体车库的目的。

This paper designs an intelligent stereo garage system based on PLC, which consists of parking space, turntable transposition device, car positioning device and elevator. The control uses Siemens S7-300 PLC as the main station, two S7-200 PLC as the slave station, Ethernet as the form of networking, and MCGS as the human-computer interaction interface. By controlling servo motor, stepping motor, frequency converter and ordinary three-phase asynchronous motor, the switch of elevator door, elevator lift, automobile fixed telescopic bracket motor, clamping motor of bracket, turntable rotation are controlled.