资料目录：

 第1章PLC周边常用器件介绍及简单应用..............................................................................-1-1.1按钮开关...........................................................................................................................-1-1.2继电器..............................................................................................................................-2-1.3三极管..............................................................................................................................-4-第2章常用继电器控制电路与相应PLC梯形图解说..............................................................-5-2.1点动电路...........................................................................................................................-5-2.2带停止的自动保持电路..................................................................................................-6-2.3自保持互锁电路.............................................................................................................-7-2.4先动作优先电路.............................................................................................................-8-2.5后动作优先电路.............................................................................................................-9-2.6时间继电器...................................................................................................................-10-2.7计数器.............................................................................................................................-12-第3章PLC编程相关软件安装....................................................................................................-13-3.1三菱PLC编程工具的安装...........................................................................................-14-3.2安装USB转串口芯片PL2303驱动..............................................................................-22-第4章三菱GXDeveloper8.31中文版编程软件的使用...........................................................-23-4.1创建工程文件.................................................................................................................-24-4.2打开工程..........................................................................................................................-29-4.3计算机与PLC连接........................................................................................................-30-4.4工程文件写入PLC..........................................................................................................-34-4.5计算机在线监视PLC...................................................................................................-36-第5章常用继电器控制电路转PLC程序编写测试..................................................................-37-5.1点动电路编写测试.........................................................................................................-38-5.2带停止的自保持电路编写测试......................................................................................-40-5.3自保持互锁电路编写测试...............................................................................................-43-5.4先动作优先电路编写测试..............................................................................................-47