【正文】
汽車型號頻繁改進(jìn),傳統(tǒng)控制系統(tǒng)捉襟見肘,弊端日益放大,最終PLC 應(yīng)運(yùn)而生??删幊炭刂破髡琼槕?yīng)這一潮流而出現(xiàn)的,以微處理器為基礎(chǔ)的通用工業(yè)控制裝置。”對生產(chǎn)過程的監(jiān)控首先離不開采集設(shè)備工作信息,因此選用合適的傳感器至關(guān)重要,如果把計(jì)算機(jī)看作是自動化系統(tǒng)的“大腦”,信道看作是“神經(jīng)網(wǎng)絡(luò)”的話,那么傳感器就是自動化系統(tǒng)的“五官”。隨著科學(xué)技術(shù)的不斷發(fā)展,人們對溫度控制系統(tǒng)的要求越來越高,因此,高精度、智能化、人性化的溫度控制系統(tǒng)是國內(nèi)外必然發(fā)展趨勢。目前,我國在這方面總體水平處于20實(shí)際80年代中后期水平,成熟產(chǎn)品主要以“點(diǎn)位”控制及常規(guī)的PID控制器為主,它只能適應(yīng)一般溫度系統(tǒng)控制,難于控制滯后、復(fù)雜、時變溫度系統(tǒng)控制。 fuel gas, natural gas, oil, electricity etc.. Temperature control system of the process is plex and changeable, uncertain, so the system requires more advanced control technique and control theory. Programmable logic controller ( PLC ) programmable controller is a kind of industrial control puter, is the successor of puter, automatic control technology and munication technology as a whole new type of automatic device. It has strong antiinterference ability, low price, high reliability, easy programming, easy to use and other characteristics, in the industry in the field by the project operator like, so PLC has in the various fields of industrial control has been widely used.Keywords: temperature control based on PLC目 錄1 引言 3 溫度控制系統(tǒng)的意義 3 溫度控制系統(tǒng)背景 3 研究技術(shù)介紹 32 硬件設(shè)計(jì) 6 硬件配置 6 I/O分配表 8 硬件接線圖 103 軟件設(shè)計(jì) 10 PID控制程序設(shè)計(jì) 15 S7200程序設(shè)計(jì)流程圖 16 內(nèi)存地址分配與PID指令回路表 17 S7200程序設(shè)計(jì)梯形圖 174 組態(tài)編程 25 PLC通信配置與通信方式 25 網(wǎng)絡(luò)的通訊PPI協(xié)議 25 組態(tài)軟件Kingview 27 組態(tài)王定義外部設(shè)備和數(shù)據(jù)變量 27 組態(tài)王界面 30 啟動組態(tài)王 29結(jié)論 32致謝 35參考文獻(xiàn) 361 引言 溫度控制系統(tǒng)的意義溫度及濕度的測量和控制對人類日常生活、工業(yè)生產(chǎn)、氣象預(yù)報(bào)、物資倉儲等都起著極其重要的作用。溫度控制系統(tǒng) 的工藝過程復(fù)雜多變,具有不確定性,因此對系統(tǒng)要求更為先進(jìn)的控制技術(shù)和控制理論。摘 要溫度是工業(yè)生產(chǎn)中常見的工藝參數(shù)之一,任何物理變化和化學(xué)反應(yīng)過程都與溫度密切相關(guān)。例如冶金、機(jī)械、食品、化工等各類工業(yè)生產(chǎn)中廣泛使用的各種加熱爐、熱處理爐、反應(yīng)爐等;燃料有煤氣、天然氣、油、電等。關(guān)鍵字:溫度控制 PLC 組態(tài) The Title of the thesisABSTRACT Temperature is the mon industrial production process parameter, any physical change and chemical reaction process closely is related with the temperature. In scientific research and production practice of many areas, temperature control occupied an extremely important position, especially in the metallurgical, chemical, building materials, food, machinery, petroleum industry, which play a decisive role role. For different production conditions and technological requirements of temperature control, the way of heating, fuel, control scheme is also different. For example, metallurgy, machinery, food, chemical and other types of industrial production is widely used in all kinds of heating furnace, heat treatment furnace, reactor。溫度控制系統(tǒng)在國內(nèi)各行各業(yè)的應(yīng)用雖然十分廣泛,但從國內(nèi)生產(chǎn)的溫度控制器來講,總體發(fā)展水平仍然不高,同日本、美國、德國等先進(jìn)國家相比仍然有著較大的差距。參數(shù)大多靠人工經(jīng)驗(yàn)及我國現(xiàn)場調(diào)試來確定。其中,敏感元件是指直接感受或響應(yīng)被測量的部分;轉(zhuǎn)換元件是指傳感器中能將敏感元件或響應(yīng)的被測量轉(zhuǎn)換成適于傳感器或被測量的電信號部分。現(xiàn)代制造業(yè)必須對市場需求做出快速反應(yīng),生產(chǎn)小批量、多品種、多規(guī)格、低成本和高質(zhì)量的產(chǎn)品,這便要求生產(chǎn)設(shè)