基于西门子PLC及其网络的电炉温度控制系统的设计

本文ID：7087

字数:24119,页数:61

论文编号:ZD491 论文字数:24119,页数:61，有开题报告，任务书，文献综述

摘要：当今社会，信息技术迅猛发展，已经深入到各个领域，对传统的监控模式产生了极大的冲击和影响。PLC和PROFIBUS现场总线技术以其结构简单、费用低、易于维护、可靠性高、开放性等多种优势日渐成为自动化领域的热点，并以其诸多优点在工业监控领域引起了一场划时代的变革。本文首先介绍了西门子PLC和现场总线的发展现状,连接智能现场设备和控制设备的双向数字通讯技术，现场总线具有开放性和互操作性，一些控制功能得以下移到现场设备中，然后对PROFIBUS现场总线技术和以太网进行了详述。最后详细介绍了它们的网络结构和软硬件设计，并对其中的一些主要的控制问题进行了研究。应用STEP7软件在S7300和S7400中分别编写好程序，通过可编程序控制器预先编好的程序进行控制，控制通过S7300的功能块FM355的模糊控制改变交流调压器的触发时间从而改变控制电压，形成最佳的控制量输出来控制电炉的温度。PROFIBUS和以太网实现数据的传递，利用组态软件在上位机和触摸屏上生成组态画面，实现对电炉温度的远程控制。
关键词:PROFIBUS 模糊控制西门子PLC 以太网

Abstract: Current society, the information technology is developed rapidly, has already got deeply to each field, have produced great impact and influence to the traditional control mode. PLC and PROFIBUS on-the-spot bus with their of simple structure, expenses low easy to maintain , dependability high , opening ,etc. many kinds of advantage become focus of automatic field day by day technology, control with a great deal of advantage its field cause a epoch-making change in industry. This text has introduced the current situation of the development of the on-the-spot bus at first, connect the on-the-spot equipment of intelligence and two-way digital communication technology of controlling the equipment, bus live have opening and person who operate each other, some control function must following to move get on-the-spot equipment, then detailed to PROFIBUS on-the-spot bus technology. Network structure and software and hardware introducing it in detail finally are designed, and carried on research to some main control problems among them . Use STEP7 software write good procedure respectively among S7300 and S7400, through can programme procedure that controller finish in advance control, control through is it exchange to touch off time to change the voltage of controlling voltage regulator to change, form the best temperature failing to control the electric stove of control amount. PROFIBUS and Ethernet realize transmission of data, utilize configuration software in go to location produce configuration picture on the plane and touch-sensitive screen, realize the long-range control of the temperature of the circuit.
Keywords: PROFIBUS Fuzzy control Siemens PLC Ethernet

摘要…………………………………………………………………………………………Ⅰ
Abstract……………………………………………………………………………………Ⅱ
第1章绪论…………………………………………………………………………………1
    1.1 课题的内容及要求…………………………………………………………………1
    1.2 PLC的发展及应用………………………………………………………………1
        1.3.1 PLC的发展史………………………………………………………………1
        1.3.2 PLC的控制特点……………………………………………………………2
        1.3.3 西门子PLC S7400及S7300………………………………………………3
    1.4 现场总线的发展及其特点………………………………………………………5
        1.4.1 现场总线的发展和趋势…………………………………………………5
        1.4.2 现场总线的特点………………………………………………………6
    1.5 OPC……………………………………………………………………………7
    1.6 监控技术及监控软件………………………………………………………8
    1.7 本章小结………………………………………………………………………8
第2章硬件的设计及网络结构………………………………………………………9
    2.1 系统描述和控制要求………………………………………………………9
    2.2 硬件选择………………………………………………………………………9
        2.2.1 西门子S7-300………………………………………………………9
        2.2.2 西门子S7-400………………………………………………………13
        2.2.3 网线电缆及部件…………………………………………………………15
2.3 网络结构………………………………………………………………………16
     2.3.1 西门子工业以太网通讯…………………………………………………17
     2.3.2 PROFIBUS-DP现场总线…………………………………………………18
2.4 网络构成元件表…………………………………………………………………22
第 3 章系统软件程序设计………………………………………………………………24
3.1 STEP7的介绍 …………………………………………………………………24
     3.1.1 STEP7的简介……………………………………………………………24
     3.1.2 使用STEP7创建一个项目………………………………………………24
     3.1.3 STEP7安装的硬件要求……………………………………………………25
     3.1.4 STEP7安装的软件要求………………………………………………25
     3.1.5 STEP7标准软件包……………………………………………………26
3.2 控制系统的I/O点及地址分配…………………………………………………27
     3.2.1 S7300和S7400通讯所用变量…………………………………………27
     3.2.2 组态王和触摸屏所用变量………………………………………………28
     3.2.3 PLC模块安装排布顺序及地址总表……………………………………28
3.3 系统硬件和网络组态…………………………………………………………28
     3.3.1 STEP7硬件组态…………………………………………………………28
     3.3.2 网络组态………………………………………………………………33
3.4 编写程序………………………………………………………………………34
     3.4.1 S7300中的应用程序……………………………………………34
     3.4.2 S7400中的应用程序……………………………………………39
3.5 组态王软件的应用………………………………………………………41
     3.5.1 组态王软件的简介…………………………………………………41
     3.5.2 组态王画面的生成……………………………………………………42
第4章系统的调试……………………………………………………………………44
4.1 系统操作注意事项………………………………………………………………44
4.2 系统调试…………………………………………………………………………45
总结…………………………………………………………………………………………49
致谢…………………………………………………………………………………………50
参考文献………………………………………………………………………………51
附录 A……………………………………………………………………………………52
附录 B…………………………………………………………………………………53