【正文】 e the air blower to open/stops the control , the parameter hypothesis, the circulating pump control and other electric motor‘s control. This article designs the frequency conversion processs automatic control, the systems operation is stable, is reliable. Uses boiler‘s puter control and the frequency converseon control noe only may save the energy greatly, the promotion environmental protection moreover may raise the production automation level, has the remarkable economic efficiency and the social efficiency. Key Words： Boiler control； Frequency conversion velocity modulation ； Configuration Software； PLC 2 目 錄 摘要 ................................................................................................................................ 0 Abstract ......................................................................................................................... 1 第 1 章 概 述 .......................................................................................................... 4 項(xiàng)目背景及課題的研究意義 ................................................................................ 4 供暖鍋爐控制的國內(nèi)外研究現(xiàn)狀 ......................................................................... 5 鍋爐控制系統(tǒng)的發(fā)展趨勢 ..................................................................................... 6 本文所做工作 ...................................................................................................... 7 第 2 章 系統(tǒng)方案設(shè)計 .................................................................................................. 9 鍋爐控制研究簡介 ............................................................................................... 9 總體設(shè)計思路 ..................................................................................................... 9 方案比較 ........................................................................................................... 10 方案 1 ...................................................................................................... 10 方案 2 ..................................................................................................... 10 方案論證與方案確定 .......................................................................................... 11 第 3 章 硬件 設(shè)計 ........................................................................................................ 12 用戶系統(tǒng)框圖 ................................................................................................... 12 鍋爐系統(tǒng)的理論分析 ......................................................................................... 13 變頻調(diào)速基本原理 .................................................................................... 13 變頻調(diào)速在供暖鍋爐中的應(yīng)用 .................................................................. 13 變頻調(diào)速節(jié)能分析 .................................................................................... 14 燃燒過程控制 .................................................................................................... 19 鍋爐控制系統(tǒng)設(shè)計 ............................................................................................. 20 控制系統(tǒng)構(gòu)成介紹 ............................................................................................. 21 第 4 章 軟件設(shè)計 ........................................................................................................ 25 S7300 系列 PLC簡 介 ........................................................................................ 26 PLC編程語言簡介 ............................................................................................. 28 PLC編程語言的國際標(biāo)準(zhǔn) ......................................................................... 28 復(fù)合數(shù)據(jù)類型與參數(shù)類型 ......................................................................... 29 系統(tǒng)存儲器 .............................................................................................. 29 S7300 CPU中的寄存器 ............................................................................ 30 STEP7 的原理 ................................................................................................. 31 STEP7 概述 .............................................................................................. 31 硬件組態(tài)與參數(shù)設(shè)置 ............................................................................... 32 符號表 .................................................................................................... 36 邏輯塊 .................................................................................................... 37 程序設(shè)計 ........................................................................................................... 38 通信系統(tǒng) ........................................................................................................... 41 人機(jī)界面 ........................................................................................................... 43 監(jiān)控軟件 WinCC介紹 .............................................................................. 43 監(jiān)控系統(tǒng)設(shè)計 ........................................................................................... 45 鍋爐監(jiān)控界面設(shè)計 .................................................................................... 49 3 第 5 章 結(jié) 論 .......................................................................................................... 53 成果的創(chuàng)造性和先進(jìn)性 ..................................................................................... 53 作用意義（經(jīng)濟(jì)效益和社會意義） ..................................................................... 53 推廣應(yīng)用范圍和前景 ......................................................................................... 53 需要進(jìn)一步改進(jìn)之處 ......................................................................................... 54 參考文獻(xiàn) ...................................................................................................................... 55 外文資料翻譯 .............................................................................................................. 56 外文翻譯原文 ....................