【正文】 ting have an error margins in a datas deliver, otherwise the whole piece according to pare the occurrence mistake, this on the hardware is a bigger difficulty. Applied more and more extensive in some appropriative equipmentses, be like the appropriative medical treatment equipments, the numerical signal equipments...etc., in pare the one data deliver, its result is very good.And the different step is an application the most extensive, this receive benefit in it of technique difficulty is opposite and want to be small, at the same time not need to prepare the specialized clock signal, its characteristics to lie in, its data is partition, the longlost send out and accept, be the CPU is too busy of time can grind to a stop sex to work, also reduced the difficulty on the hardware, the data throw to lose at the same time opposite want to be little, we can pass the examination of the data to observe whether the data that we send out has the mistake or not, be like strange accidentally the method, tired addition and eight efficacies method etc., can use to helps whether the data that we examine to send out have or not the mistake occurrence, pass the feedback to carry on the discriminator.A line of transmission of the information contain a string of and bine the cent of: The usual PLC is 8 machines, certainly also having 16 machines. We can be an at the time of sending out the data a send out to the other party, also can be 88 send out the data to the other party, an and 8 differentiationses are also the as that we say to send out the data and bine sends out the data. A speed is more and slowly, but as long as 2 or three lines can solve problem, and can use the telephone line to carry on the long range control. But bine the oscular transmission speed is very quick of, it is a string of oscular of 25600%, occupy the advantage in the short distance, the in view of the fact TTL electricity is even, being limited by the scope of one meter generally, it bine unwell used for the data transmission of the long pull, thus the cost is too expensive.Under a lot of circumstances we are total to like to adopt the string to bine the conversion chip to carry on deliver, under this kind of circumstance not need us to carry on to depositted the machine to establish too and plicatedly, but carry on the data exchanges through the data transmission instruction directly, but is not a very viable way in the correspondence, because the PLC of the other party must has been wait for your data exportation at the time of sending out the data, it can39。s machine bine, for resolve the very plicated problem to look for the best pathWe e in sight of the control that links after the electric appliances in various situation, that is already the that time generation past, now of after use in the mold a perhaps simple equipments of grassroots control that the electric appliances can do for the low level only。我希望在以后的工作中，自己能因地制宜，很好的將所學(xué)的理論知識(shí)和實(shí)際相結(jié)合，將自己的工作干好、干精。因此在線圈的兩端并聯(lián)了電容與電阻串聯(lián)的電路構(gòu)成回路，起到釋放線圈中電流的作用。綜上所述：使用LED比較合適，因?yàn)榍逑礄C(jī)上的顯示不需要太復(fù)雜，LED使用起來(lái)簡(jiǎn)單方便又便宜，而LCD的顯示亮度不夠，CTR比較占空間使用不方便。3．繼電器與晶體管輸出選型原則繼電器型輸出驅(qū)動(dòng)電流大，響應(yīng)慢，有機(jī)械壽命，適用于驅(qū)動(dòng)中間繼電器、接觸器的線圈、指示燈等動(dòng)作頻率不高的場(chǎng)合。PLC輸出接口路將中央處理單元送出的弱電控制信號(hào)轉(zhuǎn)換成現(xiàn)場(chǎng)需要的強(qiáng)電信號(hào)輸出，以驅(qū)動(dòng)電磁閥、接觸器、電機(jī)等被控設(shè)備的執(zhí)行元件。3. 力求簡(jiǎn)單、經(jīng)濟(jì)、使用及維修方便一個(gè)新的控制工程固然能提高產(chǎn)品的質(zhì)量和數(shù)量，帶來(lái)巨大的經(jīng)濟(jì)效益和社會(huì)效益，但新工程的投入、技術(shù)的培訓(xùn)、設(shè)備的維護(hù)也將導(dǎo)致運(yùn)行資金的增加。該設(shè)備可以自動(dòng)完成清洗消毒及CO2備壓等全部工序。具有功能強(qiáng)、可靠性高、配置靈活、使用方便以及體積小、重量輕等優(yōu)點(diǎn)，已經(jīng)廣泛應(yīng)用于自動(dòng)化控制的各個(gè)領(lǐng)域，并已成為實(shí)現(xiàn)工業(yè)生產(chǎn)自動(dòng)化的支柱產(chǎn)品。包裝前，啤酒一般要經(jīng)瞬間殺菌處理或經(jīng)無(wú)菌過(guò)濾處理。本設(shè)備適用桶的尺寸為高度H360—H560，直徑Φ250—Φ500。為此要解決因汽車不斷改型而重新設(shè)計(jì)汽車裝配線上各種繼電器的控制線路問(wèn)題，要尋求一種比繼電器更可靠，響應(yīng)速度更快，功能更強(qiáng)大的通用工業(yè)控制器。該設(shè)備可以自動(dòng)完成清洗消毒及CO2備壓等全部工序。（2）清洗液注滿后進(jìn)行氣沖，即內(nèi)外圈同時(shí)充入大量氣體使桶內(nèi)清洗液“沸騰”，用氣泡破裂的力量清洗酒桶內(nèi)壁，排液時(shí)內(nèi)外圈同時(shí)排液。 PLC的選型 控制功能邏輯控制功能是PLC最基本功能之一,是PLC最基本的應(yīng)用領(lǐng)域，可取代傳統(tǒng)的繼電器控制系統(tǒng)，實(shí)現(xiàn)邏輯控制和順序控制。電磁式繼電器是一種機(jī)電元件，通過(guò)機(jī)械動(dòng)作來(lái)實(shí)現(xiàn)觸點(diǎn)的通斷，是有觸點(diǎn)元件。圖3 1三菱FX2N64MR001水位控制器是指通過(guò)機(jī)械式或電子式的方法來(lái)進(jìn)行高低水位的控制，可以控制電磁閥、水泵等，成為水位自動(dòng)控制器或水位報(bào)警器，從而來(lái)實(shí)現(xiàn)半自動(dòng)化或者全自動(dòng)化。通常應(yīng)用于自動(dòng)化的控制電路中，它實(shí)際上是用小電流去控制大電流運(yùn)作的一種“自動(dòng)開(kāi)關(guān)”。本軟件包適用于三菱（MITSUBISHI FA）FX0N/1N/1S/2N/2NC、AnS/AnA、MELSEC全系列工控PLC系統(tǒng)的程序編制 主程序，氣沖，氣沖，氣沖圖4 2梯形圖結(jié)論和展望時(shí)光流逝，不知不覺(jué)我的大學(xué)生涯即將結(jié)束，畢業(yè)設(shè)計(jì)也接近尾聲。通過(guò)查詢圖書(shū)，翻閱資料，在網(wǎng)上搜索資料，和老師、同學(xué)溝通，我順利完成了自己的畢業(yè)設(shè)計(jì)。 But lead even is a fatal error greatly is what we can39。單靠人工的操作已不能滿足于目前的制造業(yè)前景,也無(wú)法保證更高質(zhì)量的要求和高新技術(shù)企業(yè)的形象.人們?cè)谏a(chǎn)實(shí)踐中看到,自動(dòng)化給人們帶來(lái)了極大的便利和產(chǎn)品質(zhì)量上的保證,同時(shí)也減輕了人員的勞動(dòng)強(qiáng)度,、整體優(yōu)化、最佳決策等,熟練的操作工、技術(shù)人員或?qū)＜?、管理者卻能夠容易判斷和操作,、模擬這些智能行為,通過(guò)人腦與計(jì)算機(jī)協(xié)調(diào)工作,以人機(jī)結(jié)合的模式,為解決十分復(fù)雜的問(wèn)題尋找最佳的途徑我們?cè)诟鞣N場(chǎng)合看到了繼電器連接的控制，那已經(jīng)是時(shí)代的過(guò)去，如今的繼電器只能作為低端的基層控制模塊或者簡(jiǎn)單的設(shè)備中使用到；而PLC的出現(xiàn)也成為了劃時(shí)代的主題，通過(guò)極其穩(wěn)定的硬件穿插靈活的軟件控制，使得自動(dòng)化走向了新的高潮。t give the superior reply。 the operation that list depends the artificial has already can39。撇開(kāi)專業(yè)知識(shí)不談，就設(shè)計(jì)所需的軟件工具，有很多我都不會(huì)運(yùn)用，在一番摸索和請(qǐng)教中，終于我的畢業(yè)設(shè)計(jì)也接近完成。因?yàn)楫?dāng)失壓或欠壓時(shí)，接觸器線圈電流將消失或減小，失去電磁力或電磁力不足以吸住動(dòng)鐵心，因而能斷開(kāi)主觸頭，切斷電源。其原理是當(dāng)接觸器的電磁線圈通電后，會(huì)產(chǎn)生很強(qiáng)的磁場(chǎng)，使靜鐵心產(chǎn)生電磁吸力吸引銜鐵，并帶動(dòng)觸頭動(dòng)作：常閉觸頭斷開(kāi)；常開(kāi)觸頭閉合，兩者是聯(lián)動(dòng)的。同時(shí)與負(fù)載類型有關(guān)。 計(jì)數(shù)控制功能是PLC的最基本功能之一。這就要求設(shè)計(jì)人員在設(shè)計(jì)前就要深入現(xiàn)場(chǎng)進(jìn)行調(diào)查研究，收集控制現(xiàn)場(chǎng)的資料，收集相關(guān)先進(jìn)的國(guó)內(nèi)、國(guó)外資料。本文討論的是PLC在實(shí)際工業(yè)控制系統(tǒng)的應(yīng)用。繼電器在控制系統(tǒng)中主要起兩種作用：（1）邏輯運(yùn)算（2）弱電控制強(qiáng)電。關(guān)鍵詞： ＰＬＣ ；管路系統(tǒng)； 清洗機(jī)Beer Cleaning Filling Control System DesignAbstractThis equipment designed for cleaning and sterilizing casks. The equipment is automatic. The key processes contain discharging remnants, swilling with water, swilling with disinfectant, swilling with aseptic water and inflating with CO2. The height of cask is 360— diameter is 250—500. The equipment is made of chassis, control unit, electromagnetic valve and piping. The center of manipulative unit is the MITSUBISHI PLC. PLC controls all of the running processes. Applied meaning that programmable logic controller have in its control the aspect in the industry gradually obvious, bine at manufacture，generate electricity, chemical engineering, electronics etc profession craft the equipment39。本文討論的是PLC在實(shí)際工業(yè)控制系統(tǒng)的應(yīng)用。PLC是繼電器邏輯控制系統(tǒng)發(fā)展而來(lái)，所以它在數(shù)學(xué)處理、順序控制方面具有一定優(yōu)勢(shì)。它具有功能強(qiáng)大、使用可靠、維修簡(jiǎn)單等許多優(yōu)點(diǎn)，并且在很多地方已逐步取代了繼電器電路的邏輯控制。因此，在設(shè)計(jì)PLC控制系統(tǒng)時(shí)，應(yīng)遵循以下基本原則：1. 最大限度地滿足被控對(duì)象的控制要求充分發(fā)揮PLC的功能，最大限度地滿足被控對(duì)象的控制要求，是設(shè)計(jì)PLC控制系統(tǒng)的首要前提，這也是設(shè)計(jì)中最重要的一條原則。同時(shí)PLC還提供了高精度的時(shí)鐘脈沖，用于準(zhǔn)確實(shí)時(shí)控制。繼電器的負(fù)載電流比較大可以達(dá)到2A。接觸器由電磁系統(tǒng)（鐵心，靜鐵心，電磁線圈