【正文】 超過傳統(tǒng)的繼電器控制電路。將 PLC運(yùn)用到運(yùn)料小車自動控制系統(tǒng)，可實(shí)現(xiàn)小車的全自動控制，降低系統(tǒng)的運(yùn)行費(fèi)用。（3）全自動控制：PLC 大多采用 CPU結(jié)構(gòu)，不斷向高性能、高速度和大容量方向發(fā)展。PLC作為目前國內(nèi)市場的主流控制器，在技術(shù)、行業(yè)影響等方面有重要作用。我國企業(yè)現(xiàn)代化生產(chǎn)規(guī)模的不斷擴(kuò)大和深化，使得生產(chǎn)物的輸送成為生產(chǎn)物流系統(tǒng)中的一個重要環(huán)節(jié)。由于 PLC綜合了計(jì)算機(jī)和自動化技術(shù)，所以它發(fā)展日新月異，大大超過其出現(xiàn)時(shí)的技術(shù)水平。遠(yuǎn)程通信功能的實(shí)現(xiàn)更使 PLC 如虎添翼。它能夠?yàn)樽詣踊刂茟?yīng)用提供安全可靠和比較完善的解決方案，適合于當(dāng)前工業(yè)企業(yè)對自動化設(shè)備的要求。s Siemens S7200 PLC, discusses the mechanical car transporter control system hardware and software design and its control principle, to achieve a mechanical automatic control of the car transporter. Through the practical application of the design of the control system is reliable, meet the actual needs.Key words: PLC mechanical car transporter automation control目 錄前 言 ............................................................................................1 設(shè)計(jì)背景及意義 ..................................................................1 設(shè)計(jì)取得的成果 ..................................................................32 PLC概述 .....................................................................................4 PLC的產(chǎn)生與定義 ...............................................................4 PLC的產(chǎn)生 ...................................................................4 PLC的定義 ...................................................................4 PLC的發(fā)展及趨勢 ...............................................................5 PLC的特點(diǎn)及其功能 ...........................................................7 PLC的基本特點(diǎn) ...........................................................7 PLC的功能 ...................................................................8 PLC與 DCS、工業(yè) PC ...................................................8 PLC的基本組成及其各部分作用 .......................................9 PLC的工作原理 .................................................................11 PLC的工作過程 .................................................................123 方案設(shè)計(jì) ..................................................................................13 方案的比較 ........................................................................13 系統(tǒng)描述 ............................................................................14 控制要求 ............................................................................14 主要電氣元件的配置 ........................................................15 PLC機(jī)型的選擇 .................................................................174 PLC控制系統(tǒng)硬件設(shè)計(jì) ...........................................................194．1 系統(tǒng)主回路與控制回路的設(shè)計(jì) ......................................19 .............................................................19 系統(tǒng)主回路設(shè)計(jì) ........................................................19總體電路圖見附錄 1 ................................................................20 機(jī)械運(yùn)料小車控制系統(tǒng)的實(shí)現(xiàn)原理 ................................20 PLC的外部接線圖 .............................................................22根據(jù)機(jī)械運(yùn)料小車的工作原理和 I/O地址分配表畫出 PLC的外部接線圖，如下: .............................................................225 PLC控制系統(tǒng)的軟件設(shè)計(jì) .......................................................24 S7程序設(shè)計(jì)的基本步驟 ...................................................24 控制系統(tǒng)的順序功能圖 ....................................................24 控制系統(tǒng)的梯形圖 ............................................................257 STEP7MICRO/WIN編程軟件的應(yīng)用 .......................................27結(jié)束語 ..........................................................................................30致 謝 ..........................................................................................32參考文獻(xiàn) ......................................................................................34附錄： ..........................................................................................35外文資料與中文翻譯 ...............................................................35前 言 設(shè)計(jì)背景及意義PLC控制系統(tǒng)的應(yīng)用幾乎涵蓋了工農(nóng)業(yè)生產(chǎn)和人類生活的各個領(lǐng)域。PLC機(jī)械運(yùn)料小車電氣控制系統(tǒng)具有連線簡單、控制速度快，精度高，可靠性和可維護(hù)性好，安裝、維修和改造方便等優(yōu)點(diǎn)。將PLC應(yīng)用到機(jī)械運(yùn)料小車電氣控制系統(tǒng)，可實(shí)現(xiàn)機(jī)械運(yùn)料小車的自動化控制，降低系統(tǒng)的運(yùn)行費(fèi)用，節(jié)省勞力。關(guān)鍵詞：PLC 機(jī)械運(yùn)料小車 自動化控制 AbstractMost of the early mechanical the car transporter electrical control system relay contactor plex system posed of, such a system design cycle, bulky, cost disadvantages, almost no data processing and munications functions, there must also be the person responsible for the operation. PLC application to mechanical car transporter electrical control system can achieve the mechanical car transporter automation control, reduce system operating costs, laborsaving. PLC mechanical car transporter electrical control system