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畢業(yè)論文-基于西門子s7-200系列plc的自動售貨機(jī)控制系統(tǒng)設(shè)計(jì)-免費(fèi)閱讀

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【正文】 A work of half is also 2 and can send out similar to accept the data, but can39。 The saving machine can deposit the data that the I/ O input in the saving machine, and in work adjusting to bee tired to add the machine and I/ Os to connect, saving machine separately saving machine RAM of the procedure saving machine ROM and dates, the ROM can do deposit of the data permanence in the saving machine, but RAM only for the CPU putes the temporary calculation usage of hour of buffer space. The PLC anti interference is very and excellent, our root need not concern its service life and the work situation bad, these all problems have already no longer bee the topic that we fail, but stay to our is a concern to e to internal resources of make use of the PLC to strengthen the control ability of the equipments for us, make our equipments more gentle. PLC language is not we imagine of edit collected materials the language or language of Cs to carry on weaving the distance, but the trapezoid diagram that the adoption is original after the electric appliances to control, make the electrical engineering teacher while weaving to write the procedure very easy prehended the PLC language, and a lot of non electricity professional also very quickly know and go deep into to the PLC. Is PLC one of the advantage above and only, this is also one part that the people prehend more and easily, in a lot of equipments, the people have already no longer hoped to see too many control buttons, they damage not only and easily and produce the artificial error easiest, small is not a main error perhaps you can still accept。t satisfied with the current manufacturing industry foreground, also can39。北京:機(jī)械工業(yè)出版社, 2021 【 8】 宋繼玉可編程控制器原理及應(yīng)用再次,感謝指導(dǎo)老師的幫助,在設(shè)計(jì)過程中遇到難題時,指導(dǎo)老師總是耐心的提供幫助,在這里向老師表示由衷地感謝。 自動售貨機(jī)是由于勞動密集型的產(chǎn)業(yè)構(gòu)造 向技術(shù)密集型社會轉(zhuǎn)變的產(chǎn)物。一個平??此坪唵问褂梅奖愕淖詣邮圬洐C(jī),其實(shí)并不是那么容易就做成的。同理,網(wǎng)絡(luò) 8 至網(wǎng)絡(luò) 12 是食品一元控制程序,網(wǎng)絡(luò) 13 至網(wǎng)絡(luò) 17 是飲料一元控制程序,網(wǎng)絡(luò)18 至網(wǎng)絡(luò) 22 是飲料兩元控制程序,網(wǎng)絡(luò) 23 至網(wǎng)絡(luò) 27 是日用兩元控制程序,網(wǎng)絡(luò) 28 至網(wǎng)絡(luò) 32 是日用三元控制程序。網(wǎng)絡(luò) 2是一元信號到加十。 在梯形圖中,有兩根豎直的直線,被稱為母線,現(xiàn)在很多 PLC 只 保留了左邊的母線,而把右邊的母線略去不寫。順序功能圖提供了一種組織程序的圖形方法,在順序功能圖中允許和別的語言編程的程序嵌套。當(dāng)按下選擇 A 商品的價格時,售貨機(jī)進(jìn)行減法運(yùn)算,從投入的貨幣總值中減去 A商品的價格同時啟動相應(yīng)的電機(jī),提取 A 號商品到出貨口。定時器指令表見表 31。 ( 4)功能完善 在 PLC 內(nèi)部具有許多控制功能,諸如時序、計(jì)算機(jī)、主控繼電器以及移位寄存器、中間寄存器等。 ( 3) 輸出刷新階段 當(dāng)所有指令執(zhí)行完畢后,將輸出狀態(tài)寄存器中的內(nèi)容,依次送到輸出鎖存電路,并通過一定輸出方式輸出,驅(qū)動外部相應(yīng)執(zhí)行元件工作,這才形成 PLC 的實(shí)際輸出。 PLC 的工作原理 PLC 的工作原理與計(jì)算機(jī)的工作原理基本是一致的,可以簡單地表述為在系統(tǒng)程序的管理下,通過運(yùn)行應(yīng)用程序完成用戶任務(wù)。 PLC及其有關(guān)的外圍設(shè)備都應(yīng)該按易于與工業(yè)控制系統(tǒng)形成一個整體,易于擴(kuò)展其功能的原則而設(shè)計(jì)。硬件主要由中央處理器 CPU、存貯器、輸入 /輸出單元以及編程器、電源和智能輸入 /輸出單元等構(gòu)成。首先就得根據(jù)設(shè)計(jì)內(nèi)容和控制要求準(zhǔn)確畫出它的順序功能圖,再根據(jù)所畫出的順序功能圖準(zhǔn)確設(shè)計(jì)出它的梯形圖,這樣才能真正理解本次自動售貨機(jī)的控制原理。但由于售貨機(jī)分布零散、范圍廣闊的特點(diǎn),自動售貨機(jī)在為消費(fèi)者帶來方便的同時,也為經(jīng)營者在監(jiān)控、管理、維護(hù)等方面帶來很大的不便。 The I/O point distribution。 文中詳盡地介紹了自動售貨機(jī)的各硬件組成,并完成了 PLC 外部接線圖。利用 PLC 控制的自動售貨機(jī)提高了系統(tǒng)的穩(wěn)定性,保證自動售貨 機(jī)能夠長期穩(wěn)定運(yùn)行。 從自動售貨機(jī)的發(fā)展趨勢來看,它的出現(xiàn)是由于勞動密集型的產(chǎn)業(yè)構(gòu)造向技術(shù)密集型社會轉(zhuǎn)變的產(chǎn)物。 自動售貨機(jī)設(shè)計(jì)的基本思路 本次設(shè)計(jì)的題目是自動售貨機(jī),主要是應(yīng)用西門子 S7200 型 PLC 的梯形圖來設(shè)計(jì)控制 程序,并簡單介紹相關(guān)的知識,如: PLC 的定義、 PLC 的編程語言、 PLC 的硬件組成等。所以設(shè)計(jì)自動售貨機(jī)是非常必要的。目前, PLC 的處理 速度與計(jì)算機(jī)相比還比較慢,其高的 CPU 也不過 80486,將來會全面使用 64 位的 RISC 芯片,采用多 CPU 進(jìn)行處理、分時處理或分任務(wù)處理方式,將各種模塊智能化,部分系統(tǒng)程序用門陣列電路固化,這樣可使 PLC 的處理速度達(dá)到納秒級。美國的幾個廠家為德州食品公司、通用電器公司、歌德公司、數(shù)字設(shè)備公司等。 ( 1) 輸入刷新階段 在輸入刷新階段, CPU 掃描全部輸入端口,讀取其狀態(tài)并寫入輸入狀態(tài)寄存器。 PLC 的特點(diǎn) ( 1)抗干擾能力強(qiáng),可靠性好 I/O 系統(tǒng)設(shè)計(jì)有完善的通道保護(hù)與信號調(diào)理電路;在結(jié)構(gòu)上對耐熱、防潮、防塵、抗震等都有周到的考慮。 第三章 自動售貨機(jī)的設(shè)計(jì) 自動售貨機(jī)設(shè)計(jì)軟元件 定時器 定時器是 PLC 中重要的編程元件,是累計(jì)時間增量的內(nèi)部器件。售貨機(jī)的基本功能就 是對投入的貨幣進(jìn)行運(yùn)算,并根據(jù)貨幣數(shù)值判斷是否能夠購買某種商品,并作出相應(yīng)的反應(yīng)。 PLC 通過輸入接口可以檢測被控對象的各種數(shù)據(jù),以這些數(shù)據(jù)作為 PLC 對被控制對象進(jìn)行控制的依據(jù);同時 PLC 又通過輸出接口將處理結(jié)果送給被控制對象,以實(shí)現(xiàn)控制目的 。它與電器控制線路圖相似, 如圖 34所示。 自動售貨機(jī)設(shè)計(jì)的梯形圖( LAD) 本此設(shè)計(jì)自動售貨機(jī)主要銷售食品 、 飲料 、 日用三大類,而食品有五角和一元,飲料有一元和二元,日用有二元和三元。如在出食品五角,則綠燈閃爍。 第五章 硬件設(shè)計(jì) PLC 外圍接線圖 售貨機(jī)的外部接線圖如圖 所示, SB2— SB7 為物品選擇按鈕,當(dāng)投入貨幣物品綠燈亮( — ),按下 SB2— SB7 其中一個,對用的 KM 線圈得電電機(jī)轉(zhuǎn)動出相應(yīng)的物品( — ),當(dāng)有物品銷售完其行程開關(guān)斷開,物品紅燈亮并同時向總部發(fā)送物品銷售完的信息;當(dāng)收買物品總值低于投入總值時,可按找零按鈕 SB1 選擇找一元還是五角( SBSB11)后 KM1 得電電機(jī)轉(zhuǎn)動找零 ()。在設(shè)計(jì)中我們用到了光電開關(guān)、電磁閥、執(zhí)行機(jī)構(gòu)等我們沒怎么接觸過的電子器件,之前我對這些元器件不是很了解,由于在設(shè)計(jì)中用到了,我查閱了一些資料,對它們的原理以及應(yīng)用有了深刻地認(rèn)識。另外,我還學(xué)會了一些基本軟件的應(yīng)用,比如 STEP 7 MicroWIN 等。 北京:北京航空航天大學(xué)出版社,2021 【 3】 周美蘭,周封,忘岳宇北京:化學(xué)工業(yè)出版社。西門子 S7200PLC 入門 [M] And the PLC emergence also became the epochmaking topic, adding the vivid software control through a very and stable hardware, making the automation head for the new high tide. The PLC biggest characteristics lie in: The electrical engineering teacher already no longer electric hardware up too many calculations of cost, as long as order the importation that the button switch or the importation of the sensors order to link the PLC up can solve problem, pass to output to order the conjunction contact machine or control the start equipments of the big power after the electric appliances, but the exportation equipments direct conjunction of the small power can. PLC internal containment have the CPU of the CPU, and take to have an I/ O for expand of exterior to connect a people39。t guarantee the equipments by the control of the single machine, but pass the information exchanges of the equipments and equipments to attain the result that we want. For example fore pack and the examination of the empress work preface, we will arrive wrapping information feedback to examine the place, and examine the information of the place to also want the feedback to packing. Pass the information share thus to make both the chain connect, being a total body, the match of your that thus make is more close, at each other attain to reflect the result that mutually flick. The PLC correspondence has already e more body now its value, at the PLC and correspondence between PLCs, can pass the munication of the information and the share of the dates to guarantee that of the equipments moderates mutually, the result that arrive already to repair with each other. Data conversion the adoption RS232 between PLC connect to e to the transmission data, but the RS232 pick up a people and can guarantee 10
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