【正文】 LC. Automation in the field of PLC technology is widely used in industry, measure and control system of the design adopts Siemens PLC S7200 CPU226 mount EM231 analog expansion module and EM222 digital quantity expansion module and LED display, sensor, control panel solar boiler, control and monitoring system for solar energy boiler to provide safe and reliable guarantee. This article has two important parts: The first part: the hardware design of solar energy boiler control system。Measurement and control instrument 目錄 III 摘要 ............................................................................................................................................. I Abstract ...................................................................................................................................... II 第一章 引言 .............................................................................................................................. 1 研究背景： .................................................................................................................. 1 課題的目的及意義 ...................................................................................................... 1 國內外發(fā)展現(xiàn)狀及前景 .............................................................................................. 2 我國太陽能鍋爐發(fā)展現(xiàn)狀與前景 .................................................................... 2 國外太陽能鍋爐發(fā)展現(xiàn)狀幾前景 .................................................................... 3 本章小結 ...................................................................................................................... 4 第二章 太陽能鍋爐的綜述 ...................................................................................................... 5 太陽能鍋爐的介紹 ...................................................................................................... 5 太陽能鍋爐的構造組成 .............................................................................................. 6 太陽能鍋爐適用范圍 .................................................................................................. 7 太陽能鍋爐供熱水的方案與選擇 .............................................................................. 8 幾種典型的太陽能熱水系統(tǒng)性能對比 ............................................................ 8 系統(tǒng)運行方式的選擇 ........................................................................................ 9 防凍系統(tǒng)的比較與選擇 ...................................................................................11 太陽能鍋爐系統(tǒng)工作原理 ........................................................................................ 12 熱管 真空管 ...................................................................................................... 12 太陽能鍋爐系統(tǒng)的總體設計 .......................................................................... 13 系統(tǒng)要求 .................................................................................................................... 15 本章小結 .................................................................................................................... 17 第三章 太陽能鍋爐測控系統(tǒng)硬件設計 ................................................................................ 18 可編程控制器 PLC 的選擇 ....................................................................................... 18 PLC 的介紹及應用領域 ................................................................................... 18 可編程控制器應用領域 .................................................................................. 21 西門子 S7200 介紹 ......................................................................................... 23 EM231 模擬量輸入模塊 ............................................................................... 25 EM 222 數(shù)字量輸出模塊 ................................................................................ 26 74LS48 譯碼驅動 ............................................................................................. 26 LED 七段數(shù)碼顯示管 ................................................................................................ 26 傳感器的選擇 ............................................................................................................ 28 測控系統(tǒng)的硬件設計 ................................................................................................ 30 PLC 接線 ........................................................................................................... 30 測控儀控制面板示意圖 .................................................................................. 34 IV 本章小結 .................................................................................................................... 35 第四章 太陽能鍋爐測控系統(tǒng)軟件設計 ................................................................................ 37 主程序設計 ................................................................................................................ 37 主程序工作過程 .............................................................................................. 37 主程序流程圖 .................................................................................................. 38 手動控制程序流程圖 ................................................................................................ 39 控制程序子程序流程圖 ............................................................................................ 40 水位控制上水子程序流程圖 .......................................................................... 40 溫差循環(huán)子程序流程圖 .................................................................................. 41 鍋爐輔助加熱子程序流程圖 .......................................................................... 42 低溫防凍子程序流程圖 .................................................................................. 43 報警子程序流程圖 .......................................................................................... 44 系統(tǒng)的模擬量內存地址分配和 I / O 口地址分配 .................................................. 45 本章小結 ....................................