【正文】 ence and technology, highprecision, intelligent, userfriendly temperature control system is the inevitable trend of development at home and abroad. Keywords: Temperature Control PLC HMI Kingview III 目 錄 第一章 前言 ................................................................................................................................................1 項(xiàng)目背景、意義 ...........................................................................................................................1 溫控系統(tǒng)的現(xiàn)狀 ...........................................................................................................................2 項(xiàng)目研究?jī)?nèi)容 ................................................................................................................................3 第二章 PLC 和 HMI基礎(chǔ) ..................................................................................................................5 可編程控制器基礎(chǔ) .......................................................................................................................5 可編程控制器的產(chǎn)生和應(yīng)用 ..............................................................................................5 可編程控制器的組成和工作原理 ......................................................................................5 可編程控制器的分類及特點(diǎn) ..............................................................................................8 人機(jī)界面基礎(chǔ) ................................................................................................................................8 人機(jī)界面的定義 ...................................................................................................................8 人機(jī)界面產(chǎn)品的組成及工作原理 ......................................................................................9 人機(jī)界面產(chǎn)品的特點(diǎn) ..........................................................................................................9 第三章 PLC 控制系統(tǒng)硬件設(shè)計(jì) ...................................................................................................... 10 PLC控制系統(tǒng)設(shè)計(jì)的基本原則和步驟 ................................................................................... 10 PLC控制系統(tǒng)設(shè)計(jì)的基本原則 ........................................................................................... 10 PLC控制系統(tǒng)設(shè)計(jì)的一般步驟 ............................................................................................11 PLC的選型與硬件配置 ............................................................................................................ 13 PLC型號(hào)的選擇 .................................................................................................................... 13 S7200 CPU 的選擇 ............................................................................................................... 14 EM231模擬量輸入模塊 ......................................................................................................... 14 熱電式傳感器 .................................................................................................................... 16 I/O點(diǎn)分配及電氣連接圖 ........................................................................................................ 17 PLC控制器的設(shè)計(jì) .................................................................................................................... 17 控 制系統(tǒng)數(shù)學(xué)模型的建立 ............................................................................................... 17 PID控制及參數(shù)整定 ........................................................................................................... 19 第四章 PLC 控制系統(tǒng)軟件設(shè)計(jì) ...................................................................................................... 22 PLC程序設(shè)計(jì) 方法 .................................................................................................................... 22 編程軟件 STEP7MICRO/WIN 概述 ................................................................................... 23 STEP7Micro/WIN 簡(jiǎn)單介紹 ................................................................................................ 23 梯形圖語言特點(diǎn) ................................................................................................................ 24 STEP7Micro/WIN 參數(shù)設(shè)置（通訊設(shè)置） ....................................................................... 25 程序設(shè)計(jì) ..................................................................................................................................... 27 設(shè)計(jì)思路 ............................................................................................................................ 27 控制程序流程圖 ................................................................................................................ 27 梯形圖程序 ........................................................................................................................ 28 PID指令向?qū)У倪\(yùn)用 ........................................................................................................... 31 語句表（ STL）程序 ........................................................................................................ 35 第五章 基于組態(tài)王的 HMI設(shè)計(jì) ........................................................................................................ 37 IV 人機(jī)界面（ HMI）設(shè)計(jì) ............................................................................................................ 37 監(jiān)控主界面 ........................................................................................................................ 38 實(shí)時(shí)趨勢(shì)曲線 .................................................................................................................... 39 歷史趨勢(shì)曲線 .................................................................................................................... 40 報(bào)警窗口 ............................................................................................................................ 40 設(shè)定畫面 ............................................................................................................................ 42 變量設(shè)置 .....................