基于plc控制系统十字路口交通灯设计 学位论文.doc

摘 要 通过对对欧姆龙公司小型化PLC的CPM1A系列产品系统的学习，掌握PLC的工作原理及结构，PLC的输入、输出以及接线、编程等，由于可编程序控制器应用的广泛性，各种机型所具备的指令系统也不完全相同，现代的可编程序控制器的指令功能越来越强，内部元件的个数也越来越多。在机型选择时，从指令系统方向应注意下述内容：指令系统的总语句数，这一点反映了整个指令所包括的全部功能；指令系统的种类，主要应包括逻辑指令，运算指令和控制指令，具体的要求则与实际要完成的控制功能有关；指令系统的表达方式，指令系统的表达方式有多种；应用软件的程序结构图，程序结构有模块化的程序结构，有子程序式的程序结构；软件开发手段。然后选用PLC的CPM1A-30CDT-D系列控制红绿灯运转，使红绿灯按照自己编的梯形图开始运行，由于红绿灯是由PLC控制的，为了提高红绿灯的运行效率，必须通过软硬件设计提高PLC的抗干扰等。 关键词：PLC控制系统；十字路口；交通灯 Abstract  Through the right right Omron Corporation PLC of the small family system CPM1A the study, master PLC principle and structure of the work, PLC of the import, export and wiring, programming, PLC as the breadth of application, all kinds of Those models do not exactly the same command system, modern PLC command function is growing, the number of internal components are more and more. In the model chosen, the direction from the command system should pay attention to the following: instruction of the total number of statements, which reflect the entire command by including all the functions of the type of instruction, the main logic should include instruction, command and control operations Instructions and specific requirements are to be completed and the actual control functions related to instruction means of expression, the command system has a variety of means of expression; application procedures for structural plans, procedures modular structure of the program structure, a subroutine - The program structure; software development tools. Then choose the PLC CPM1A-30CDT-D series of operational control of traffic lights, traffic lights, according to its own series of ladder running, because of the traffic lights are controlled by the PLC in order to improve the operating efficiency of traffic lights, it is necessary to improve the design of hardwareand software PLCs anti-jamming And so on. Key words: PLC control system; crossroads; traffic lights 目 录 第一篇 交通灯的发展、结构、现状 1 第二篇 可编程控制器概述 4 第一章 PLC的特点与应用领域 4 第