摘 要
本文介绍的是用PLC来对锅炉输煤系统进行控制。锅炉输煤系统，是指从卸煤开始，一直到将合格的煤块送到煤仓的整个工艺过程，它包括以下几个主要环节：卸煤生产线、煤场、输煤系统、破碎与筛分、配煤系统以及一些辅助生产环节。本设计中主要研究的是其中的输煤系统部分，即煤块从给煤机传输到原煤仓的过程。采用了顺序控制的方法。首先，介绍了PLC的一些基本常识问题。在具体的设计中，先讲述了PLC设计的一些基本方法及步骤。详细介绍了西门子公司的型号为S7-200的PLC的一些基本知识。之后重点讲述了PLC程序设计中的启动，停止，位置选择及输出报警等问题，也讲了I/O点分配的一些事项并对本设计中的对象进行了地址分配。在上位机的设计中，我用了工业组态软件——组态王来进行操作界面制作，并使之与PLC进行通讯，使之达到远程控制的功能，中间又重点讲述了制作操作界面的步骤及方法。
关键词: 输煤系统,PLC,I/O,组态王
Design of PLC Control System
The System of Transport Coal in Boiler
Abstract
This paper design for the boiler which is beaten the coal measures together with PLC . The transportation system of coal in boiler is that beginning with unload coal from car, and until to warehouse. The system includes several chief segments: coal does unload manufacture part, coal warehouse, transportation system of coal, fragmentation coal, sift through and other supplementary system. The transportation system of coal is the chief part of this design. In other words is that a course from the machine of supply coal to the warehouse of coal.
We chose the method of sequential control in the system. First, the paper tells us some fundamental general knowledge problems of PLC and the fundamental means and step in this design. The type detailed to introduce some fundamental in formations of the PLC of S7-200 of the siemens corporation. Then we can know some problem about PLC programming 's start, stop and output alarm, and also say that I/O touches some matters distributing has been underway the address assignment allocation to the target in native design . In ordinate engine design , I use the industry configuration , and software - configuration monarch comes to manipulate interface manufacturing , and cause it carry on the news dispatch against PLC , causing it attain the remote control meritorious service capacity , move and means manufacturing the operation interface are stress give an account of once more to the middle .
Keywords: the system of transport coal in boiler, PLC, I/O, Kingviews
目录
1 绪论................................................................... 10
1.1 锅炉系统概述......................................................... 10
1.2 锅炉输煤系统 .........................................................10
2 可编程控制器(PLC) ......................................................11
2.1 可编程控制器(PLC)简介 ................................................11
2.1.1 PLC的历史.......................................................... 11
2.1.2 PLC的基本概念 ......................................................11
2.1.3 PLC的基本机构 ......................................................12
2.1.4 PLC的扫描工作方式 ..................................................12
2.1.5 PLC的I/O模块....................................................... 14
2.1.6 PLC的功能及特点.................................................... 14
2.1.7 PLC的分类.......................................................... 15
2.1.8 PLC的通信联网...................................................... 16
2.2 PLC控制系统设计步骤及内容 ............................................17
2.2.1分析评估及控制任务 ..................................................17
2.2.2 PLC的选择 ..........................................................19
2.2.3 I/O地址分配 ........................................................21
2.2.4 系统设计 ...........................................................21
2.2.5 系统调试 ...........................................................22
2.3 SIMATIC S7-200 .....................................................23
2.3.1 SIMATIC S7-200概述................................................. 23
2.3.2 SIMATIC S7-200的CPU型号 ............................................23
3 PLC输煤控制系统设计 ....................................................25
3.1 输煤系统简介......................................................... 25
3.1.1 系统组成 ...........................................................25
3.1.2 系统目标 ...........................................................27
3.1.3 控制对象及控制方案................................................. 27
3.1.4 系统设计的关键问题及解决方案....................................... 28
3.1.5 系统的I/O分配...................................................... 29
3.2 系统设计............................................................. 33
3.2.1 系统启动部分设计................................................... 33
3.2.2 系统停止部分设计 ...................................................36
3.2.3 系统位置选择及输出报警设计......................................... 37
4 操作界面设计........................................................... 39
4.1 工业组态软件——组态王................................................39
4.1.1 组态王简介 .........................................................39
4.1.2 关于组态王变量的问题 ...............................................39
4.1.3 组态王的动画连接................................................... 42
4.1.4 本设计中组态王的界面设计 ...........................................45
论文总结 .................................................................46
致谢..................................................................... 47
参考文献 .................................................................48
附录 设计程序 ............................................................49
