摘要可编程控制器(PLC)以微处理器为核心,普遍采纳依据继电接触器控制系统电气 原理图编制的梯形图语言进行程序设计,编程容易,功能扩展方便,修改灵活,而且 结构简单,抗干扰能力强。欧姆龙 CPM2A 系列可编程控制器指令丰富,可以接各种输 入、输出设备,并有丰富的特别扩展设备,其中的模拟输入设备和通信设备更是符合 交通灯控制系统的要求与特点,能够方便地联网通信。可以利用梯形图和语句表进行 编程,实现了十字路交通灯控制系统的自动化。关键词:可编程控制器;交通灯;梯形图;语句;AbstractProgrammable logic controller (PLC) by microprocessor as the core, generally adopted according to the relay contactor controlling system of electrical schematic diagram of the ladder diagram language program design, programming, easy extension, modification, flexible and convenient, simple in structure, strong anti-jamming capability. CPM2A omron series programmable controller can meet all kinds of rich command input and output devices, and has abundant special equipment, including expansion of the analog input devices and communications equipment i s consistent with traffic control system of the request and the characteristic, can be easily networked communication. Can use the ladder-diagram programming and statements, realizing the table of intersection traffic control system of automation.Key Word: programmable controller, Traffic lights, Ladder diagram, Statements, automation.绪言第一章可编程控制器 PLC1.1 可编程控制器 PLC 概述 21.2 PLC 的进展历程及趋势 21.3 PLC 的硬件结构及原理 5第二章交通灯的系统设计2.1 交通灯控制系统的控制要求 82.2 系统设计方案 82.3 硬件设计 102.3.1 PLC 的选型及接线 102.3.2PLC 的安装 112.3.3PLC 接线 112.3.4 梯形图语言: 13第三章系统检测与调试3.1 检测与调试 163.2 系统运行 16结论致谢参考文献绪言随着科学技术的进展,电气控制技术在各个领域得到越来越广泛的应用。可编 程控制器(PLC)作为电气控制领域的一项新技术,经过三十多年的进展,已经...