目录摘要..................................................................................................................................................11、课程设计概述............................................................................................................................21.1 PLC 概述...........................................................................................................................21.2 SIEMENS S7-200 简介...................................................................................................32、基于 PLC 的步进电机控制.......................................................................................................32.1 设计要求..........................................................................................................................32.2 三相六拍步进电机的工作原理......................................................................................32.3 步进电机各按键的作用..................................................................................................42.4 基于 PLC 的步进电机控制程序梯形图.........................................................................52.5 问题及解决方法..............................................................................................................73、PLC 实现智能交通灯控制3.1 设计要求............................................................................................................................83.2 系统运行过程分析............................................................................................................83.3 系统时序图........................................................................................................................93.4 输出地址分配................................................................................................................103.5 PLC 实现智能交通灯控制程序梯形图........................................................................103.6 问题及...
