【正文】 e construction of elevator also illustrates the general design project, the design processand construction of the PLC control system for threestorybuildings, listing the main circuit, trapezia controlchart of elevator and repertoires. It also shows the construction of frame chart and process flow chart. Thus the method of PLC programming is on the basis of analyzing and dealing with the logic relationship of random also create a plicated elevator control system. If the project can be accepted, it will solvethe problem metioned above.KEYWORDS: Elevator。同時(shí)給出了系統(tǒng)組成框圖和程序流程圖，在分析、處理隨機(jī)信號(hào)的邏輯關(guān)系的基礎(chǔ)上，提出了具體的 PLC編程方法，設(shè)計(jì)了一套完善的方案關(guān)于電梯控制系統(tǒng)。而 PLC 作為一種工業(yè)控制微型計(jì)算機(jī)，它以其編程方便、操作簡(jiǎn)單尤其是它的高可控性的優(yōu)點(diǎn)不僅在工業(yè)生產(chǎn)過(guò)程中得到了廣泛的應(yīng)用，其組成的控制系統(tǒng)可以很好地解決上述這些問(wèn)題。目 錄四層電梯職能控制系統(tǒng)畢業(yè)論文目 錄設(shè)計(jì)總說(shuō)明 ............................................................................................................................IABSTRACT .........................................................................................................................II1 緒論 ...............................................................................................................................12 概述及組成 ...................................................................................................................3 電梯的概述 ..........................................................................................................3 電梯繼電器控制系統(tǒng)的特點(diǎn)及存在問(wèn)題 ...................................................3 電梯繼電器控制系統(tǒng)的優(yōu)點(diǎn) .......................................................................3 電梯繼電器控制系統(tǒng)的缺點(diǎn) .......................................................................4 電梯變頻調(diào)速控制的特點(diǎn) ...........................................................................4 PLC 簡(jiǎn)介及其特點(diǎn) ...................................................................................................5 PLC 簡(jiǎn)介 ............................................................................................................5 PLC 特點(diǎn) ............................................................................................................5 PLC 控制電梯的邏輯關(guān)系 ................................................................................6 PLC 控制電梯的優(yōu)點(diǎn) ........................................................................................63 PLC 控制系統(tǒng)硬件設(shè)計(jì) ................................................................................................7 四層電梯曳引電機(jī)及門(mén)電機(jī)電路圖 ..................................................................8 PLC 外部接線圖 .......................................................................................................8 I/0 點(diǎn)數(shù)的分配及機(jī)型的選擇 .............................................................................10 I/O 點(diǎn)數(shù)的估算 ..............................................................................................10 輸入/輸出的分配 .......................................................................................10 機(jī)型的選擇 .................................................................................................11 電梯控制系統(tǒng)結(jié)構(gòu)框圖 ....................................................................................124 系統(tǒng)軟件設(shè)計(jì) .............................................................................................................14 PLC 的編程語(yǔ)言 .....................................................................................................14 STEP 7 概述 ...........................................................................................................14 程序設(shè)計(jì)常用方法 ............................................................................................155 四層電梯梯形圖 .........................................................................................................17 外召喚信號(hào)登記及消除 ....................................................................................17 內(nèi)指令信號(hào)登記及消除 ....................................................................................18 電梯的平層信號(hào)處理 ........................................................................................19 選層定向及反向截梯 ........................................................................................20目 錄 內(nèi)指令外召喚信號(hào)的保持 ................................................................................22 各樓層停車(chē)信號(hào) ................................................................................................23 自動(dòng)開(kāi)關(guān)門(mén) ........................................................................................................246 電梯系統(tǒng)模擬調(diào)試 .....................................................................................................25 S7200 仿真軟件 簡(jiǎn)介 .................................................................................25 S7200 仿真軟件界面介紹 ............................................................................25 常用菜單常用菜單命令介紹 .....................................................................26 四層電梯在 S7200 仿真軟件上仿真調(diào)試 ......................................................26 準(zhǔn)備工作 .....................................................................................................26 程序仿真 .....................................................................................................277 控制過(guò)程分析 .............................................................................................................29 電梯上行（例，從一層到二層）： ................................................................29 樓道呼梯： .................................................................................................29 梯內(nèi)呼梯： ....................................................................................