PLC 仿真软件应用 (补充教材) 赵 进 学 衡水铁路电气化学校 2007 年 7 月 - 2 - 目 录 前 言................................................................................................................................. 3 §1 PLC 概述和编程要点 ................................................................................................... 4 §1.1 PLC 简介与内部构成 .......................................................................................... 4 §1.2 PLC 与继电器的联系、软元件符号与编程示例 .............................................. 5 §1.3 PLC 输入输出接口 .............................................................................................. 7 §1.4 通用辅助继电器和继电器自锁互锁 ..................................................................... 8 §1.5 计时器和计数器 ..................................................................................................... 8 §1.6 母线连接和触点状态 ............................................................................................. 8 §1.7 边沿触点和触点块 ................................................................................................. 9 §1.8 PLC 运行顺序和编程注意事项 .......................................................................... 9 §1.9 步进控制与步进指令编程 ................................................................................... 10 表 1-4 PLC 编程常用指令 ......................................................................................... 12 §1 练习题 ...................................................................................................................... 12 §2 PLC 计算机仿真软件 ................................................................................................. 13 §2.1 仿真软件界面 ....................................................................................................... 13 §2.2 编程方式与符号栏 ...........
