目录摘要..................................................................................................................................................2第一章概述....................................................................................................................................31.1PLC的基本概念与基本结构............................................................................................31.1.1PLC的的基本概念.................................................................................................31.1.2PLC的基本结构.....................................................................................................31.2PLC的特点与应用领域....................................................................................................51.2.1PLC的特点.............................................................................................................51.2.2PLC的应用领域.....................................................................................................6第二章PLC的硬件与工作原理....................................................................................................62.1PLC的硬件........................................................................................................................62.1.1PLC的物理结构.....................................................................................................62.1.2CPU模块中的存储器.............................................................................................62.2PLC的工作原理................................................................................................................7第三章PLC程序设计基础............................................................................................................83.1PLC编程语言与编程结构................................................................................................83.1.1顺序功能图（SFC）...............................................................................................93.1.2梯形图(LD).............................................................................................................93.1.3功能块图(FBD).....................................................................................................103.1.4指令表(IL).............................................................................................................113.2顺序控制梯形图的设计方法...........................................................................................113.2.1起保停电路的编程方式........................................................................................113.2.2以转换为中心的编程方式....................................................................................12第四章三菱公司F1—40MR型PLC的使用...............................................................................134.1三菱公司的PLC产品及F1—40MR...............................................................................134.1.1F1系列PLC的指令系统简介：...........................................................................134.1.2F1—40MR的编程元件：.....................................................................................134.1.3某些编程元件使用特性及含义：........................................................................144.2F1-20P简易编程器的使用......................
