【正文】 ）觸頭系統(tǒng)（常開觸頭和常閉觸頭）和滅弧裝置組成。失壓保護(hù)：就是當(dāng)電源停電或者由于某種原因電源電壓降低過多(欠壓)時，保護(hù)裝置能使電動機(jī)自動從電源上切除。在課題設(shè)計過程中出現(xiàn)了很多問題，當(dāng)然在處理問題的同時，我也學(xué)到了很多有用的東西。 Van Gemert, Paul. Design and implementation of a plc continuous casting control system [R]. New [12]Du Toit, Chris. The design, documentation and maintenance of PLC software [R]. [13] . PLC technique discussion and future development[R] Electronic Test Equipmentprinciples and Applications. Princeton University. America[14]Hill, Peter .Design of medium voltage cables: Cable design in Eastern Electricity PLC and how it has affected installation[R].IEE 附錄A：外文文獻(xiàn)及譯文PLC technique discussion and future developmentFrom:Electronic Test Equipmentprinciples and Applications. Princeton University. AmericaAlong with the development of the ages, the technique that is nowadays is also gradually perfect, the petition plays more more strong。 But take data in the watch for an instruction procedure that controls the PLC, that had the difficulty very much, for example you have to control one pedestal robot to press the action work that you imagine, you will draw up for it the form that a procedure bine with the data sends out to pass by.The form that information transport contain single work, the half a work and the difference of a workses .The meaning of the single work also is to say both, a can send out only, but a can receive only, for example a spy he can receive the designation of the superior only, but can39。PLC的最大特點在于：電氣工程師已不再電氣的硬件上花費太多的心計，只要將按鈕開關(guān)或感應(yīng)器的輸入點連接到PLC的輸入點上就能解決問題，通過輸出點連接接觸器或繼電器來控制大功率的啟動設(shè)備，而小功率的輸出設(shè)備直接連接就可以。t is tolerant of. New technique always for bringing more safe and convenient operation for us, make we a lot of problems for face on sweep but light, do you understand the HMI? Says the HMI here you basically not clear what it is, also have no interest understanding, change one inside text explains it into the touch to hold or manmachine interface you knew, it bines with the PLC to our larger space.HMI the control not only only is reduced the control press button, increase the vivid of the control, more main of it is can sequence of, and at can the change data input to output the feedback with data, control in the temperature curve of imitate but also can keep the manifestation of view to e out. And can write the function help procedure through a plait to provide the help of various what lies in one39。本次設(shè)計對我的專業(yè)知識進(jìn)行了充分的考察，如果有時間和機(jī)會，我希望能繼續(xù)對本系統(tǒng)進(jìn)行深入研究和探索。本設(shè)計課題為基于PLC的啤酒清洗灌裝控制系統(tǒng)，主要研究灌裝過程中啤酒桶的清洗，其實灌裝不只用到啤酒桶，有的也用瓶裝，但是考慮到大多數(shù)但是用桶裝，所以這里我主要介紹啤酒桶的清洗方式。故在電路中起著自動調(diào)節(jié)、安全保護(hù)、轉(zhuǎn)換電路等作用。圖3 2水位控制器電磁閥是用電磁控制的工業(yè)設(shè)備，用在工業(yè)控制系統(tǒng)中調(diào)整介質(zhì)的方向、流量、速度和其他的參數(shù)。晶體管是一種電子元件，它是通過基極電流來控制集電極與發(fā)射極的導(dǎo)通。在單機(jī)控制、多機(jī)群控和自動生產(chǎn)線控制方面都有很多成功的應(yīng)用實例。為保證酒桶內(nèi)盡可能不含氧氣及不潔凈氣體，所以氣沖時用CO2。本設(shè)備適用桶的尺寸為高度H360—H560，直徑Φ250—Φ500。于是可編程控制器應(yīng)運而生，1969年，美國數(shù)字設(shè)備公司研制出世界上第一臺可編程控制器，從此，PLC開始活躍于控制領(lǐng)域。本機(jī)主要由機(jī)架、電氣控制箱、電磁閥、氣動元件、氣沖系統(tǒng)和水路系統(tǒng)組成。桶裝啤酒目前包裝容器一般采用不銹鋼桶或不銹鋼內(nèi)膽、帶保溫層的保鮮桶，桶的規(guī)格有50L、30L、20L、10L、5L等。 、抗干擾能力強(qiáng) 、安裝容易，維護(hù)工作量少 、通用性好 ，成功率高 ，重量輕、功耗底等特點。 清洗機(jī)的用途特點 圖2 1清洗機(jī) 本設(shè)備是專為啤酒保鮮容器（包括不銹鋼、塑料保鮮桶及扎啤桶）的清洗、消毒設(shè)計的。例如：應(yīng)該保證PLC程序不僅在正常條件下運行，而且在非正常情況下（如突然掉電再上電、按鈕按錯等），也能正常工作。PLC輸入接口用戶設(shè)備需輸入PLC的各種控制信號，如限位開關(guān)、操作按鈕、選擇開關(guān)、行程開關(guān)以及其它一些傳感器輸出的開關(guān)量或模擬量(要通過模數(shù)變換進(jìn)入機(jī)內(nèi))等，通過輸入接口電路將這些信號轉(zhuǎn)換成中央處理單元能夠接收和處理的信號，用這些數(shù)據(jù)作為PLC對被控制對象進(jìn)行控制的依據(jù)。晶體管是電子原件只有老化，沒有使用壽命限制。CTR的優(yōu)點是顯示面積大，效率高。 線圈保護(hù)裝置清洗機(jī)的排水、進(jìn)水電磁閥是一個很重要的部件，它的負(fù)擔(dān)很重、受力很大，由于它是雙線圈電磁閥，通過機(jī)械觸點進(jìn)行切換，在此過程中，觸點間存在較為嚴(yán)重的大火現(xiàn)象，因此，觸電的燒傷、電腐蝕在所難免，損壞的幾率是比較大的。在本次畢業(yè)設(shè)計的進(jìn)程中，我仔細(xì)梳理了所學(xué)的理論知識，結(jié)通過實際的應(yīng)用，更加牢固的掌握了它們，也學(xué)習(xí)到很多書本上所沒有的知識，如，一個系統(tǒng)好，但廠家不一定會用最好的，而是用性價比最高的，或者說最能讓他們利益最大化的那個，我們說設(shè)計的系統(tǒng)，大多都脫離實際更貼近理想化。s brain and calculators, with the mode that person39。 But whole pair works is both can send out and accept the data, and can send out and accept at the same time. Be like the Internet is a typical example.The process that information transport also has synchronous and different step cent: The data line and the clock lines are synchronous when synchronous meaning lie in sending out the data, is also the data signal and the clock signals to be carry on by the CPU to send out at the same time, this needs to all want the specialized clock signal each other to carry on the transmission and connect to send, and is constrained, the characteristics of this kind of method lies in its speed very quick, but correspond work time of take up the CPU and also want to be long oppositely, at the same time the technique difficulty also very big. Its request lies in can39。t do other works.When you are reading the book, you hear someone knock on door, you stop to start up of affair, open the door and bine to continue with the one who knock on door a dialogue, the telephone of this time rang, you signal hint to connect a telephone, after connecting the telephone through, return overdo e together knock on door to have a conversation, after dialogue plete, you continue again to see your book, this kind of circumstance we are called the interruption to it, it has the authority, also having sex of have the initiative, the PLC had such function .Its characteristics lie in us and may meet the urgently abrupt affairs in the operation process of the equipments, we want to stop to start immediately up of work, the whereabouts manages the more important affair, this kind of circumstance is we usually meet of, PLC while carry out urgent mission, total will keep the current appearance first, for example the address of the procedure, CPU of tired add the machine data etc., be like to to stick down which the book that we see is when we open the door the page or simply make a mark, because we treat and would still need to continue immediately after book of see the behind. The CPU always does the affair that should do according to our will, but your mistake of give it an affair, it also would be same to do, this we must notice.The interruption is not only a, sometimes existing jointly with the hour several inside break, break off to have the preferred Class, they will carry out the inter