目录第1章引言··························································11.1可编程控制器的简单介绍············································11.2西门子S7-200的简单介绍··········································41.3C650卧式车床简述·················································5第2章继电接触器控制系统设计······································72.1C650卧式车床的控制要求···········································72.2电气控制线路分析···················································72.3C650卧式车床电气控制线路的特点····································9第3章C65O普通车床的PLC设计过程································103.1控制要求··························································103.2方案说明··························································103.3确定I/O信号数量，选择PLC的类型··································103.4C650普通车床PLC控制系统I/O地址分配表···························113.5控制电路设计······················································113.6PLC控制程序设计··················································133.7C650普通车床控制系统PLC控制程序语句表····························153.8系统调试··························································18结论····································································19设计总结·······························································20谢辞····································································21参考文献·······························································221第1章引言本设计主要针对C650普通车床进行电气控制系统硬件电路设计，包括主电路、控制电路及PLC硬件配置电路。1.1可编程控制器的简单介绍1.1.1PLC的工作原理PLC英文全称ProgrammableLogicController,中文全称为可编程逻辑控制器，定义是:一种数字运算操作的电子系统，专为在工业环境应用而设计的。它采用一类可编程的存储器，用于其内部存储程序，执行逻辑运算,顺序控制，定时，计数与算术操作等面向用户的指令，并通过数字或模拟式输入/输出控制各种机械或生产过程。PLC采用循环扫描的工作方式，即顺序扫描，不断循环这种工作方式是在系统软件控制下进行的。当PLC运行时，CPU根据用户按控制要求编写好并存于用户存储器中的程序，按序号作周期性的程序循环扫描，程序从第一条指令开始，逐条顺序执行用户的程序直到程序结束。然后重新返回第一条指令，再开始下一次扫描；如此周而复始。实际上，PLC扫描工作除了执行用户程序外，还要完成其他工作，整个工作过程分为自诊断、通讯服务、输入处理、输...
