【正文】 T39 在第 15 邏輯行中的常閉觸點(diǎn)斷開，南 、 北綠燈閃爍結(jié)束；同時(shí)第 16 邏輯行中的 T39 的常開觸點(diǎn)閉合， 接通，南 、 北黃燈工作第 6 邏輯行中的 T39 的常開觸點(diǎn)閉合，計(jì)時(shí)器 T40 接通并計(jì)時(shí)；經(jīng)過 2S 后， T40 動(dòng)作，第 16 邏輯行中的 T40 的常閉觸點(diǎn)斷開， 失電，南 、 北黃燈停止工作。 (8)當(dāng)南 、 北向黃燈停止工作時(shí)，正好東 、 西向紅燈工作了 30S，即第 7 邏輯行中的 T41計(jì)時(shí) 30S，此時(shí) T41 動(dòng)作，第 3 邏輯行中的 T37 復(fù)位，且使得第 1 20 邏輯行中的常開觸點(diǎn)復(fù)位，進(jìn)入下一次循環(huán)。 交通信號(hào)燈的狀態(tài)波形圖 圖 3 交通信號(hào)燈的狀態(tài)波形圖 18 結(jié) 論 通過本系統(tǒng)的設(shè)計(jì)，對(duì)于西門子 S7200 系列 PLC 的特點(diǎn)有了更深的了解。十字路口交通燈控制系統(tǒng)利用了西門子 S7200 系列 PLC 的特點(diǎn)，對(duì)按鈕 、 開關(guān) 、 交通等輸入 /輸出點(diǎn)進(jìn)行控制，實(shí)現(xiàn)了十字路口交通燈控制中的自動(dòng) 化。這只是一個(gè)簡單的控制系統(tǒng)，并不能十分有效的改變交通的現(xiàn)狀，不過可以根據(jù)現(xiàn)實(shí)中某一方向車流量的大小來對(duì)程序進(jìn)行改變，使之更適合交通的現(xiàn)實(shí)狀況。 參考文獻(xiàn) [1] 廖常初 《可編程序控制器的編程方法與工程應(yīng)用》 [M] 重慶大學(xué)出版社 [2] 鐘肇新 彭侃 《可編程序控制器原理及應(yīng)用》 [M] 華南理工大學(xué)出版社 [3] 戴仙金 《 西門子 S7200系列 PLC應(yīng)用與開發(fā) 》 [M] 中國水利水電出版社 [4] 羅宇航 《 流行 PLC實(shí)用程序及設(shè)計(jì) 》 [M] 西安電子科技大學(xué)出版社 [5] 張立科 《 PLC應(yīng)用開發(fā)技術(shù)與工程實(shí)踐 》 [M] 人民郵電出版社 致 謝 經(jīng)過近一個(gè)學(xué)期的努力， PLC 在交通信號(hào)燈中的應(yīng)用的設(shè)計(jì)順利完成了。這主要感謝指導(dǎo)老師的幫助和提點(diǎn)。 在本次論文寫作過程中，一直給與關(guān)心和幫助的領(lǐng)導(dǎo)和老師表示深深的謝意，特別是楊熙老師，她高度負(fù)責(zé)的指導(dǎo)和安排了論文的寫作，再次向她表示謝意 。同時(shí)也要感謝在我大學(xué)期間的學(xué)習(xí)生活中，培育及關(guān)心過我的所有老師及領(lǐng)導(dǎo)們，正是他們的辛苦工作和無私奉獻(xiàn)，幫助我順利的完成了學(xué)業(yè)。 ag an employment tribunal clai Emloyment tribunals sort out disagreements between employers and employees. You may need to make a claim to an employment tribunal if: you don39。t agree with the disciplinary action your employer has taken against you your employer dismisses you and you think that you have been dismissed unfairly. For more informu, take advice from one of the anisations listed under Further help. Employment tribunals are less 19 formal than some other courts, but it is still a legal process and you will need to give evidence under an oath or affirmation. Most people find making a claim to an employment tribunal challenging. If you are thinking about making a claim to an employment tribunal, you should get help straight away from one of the anisations listed under Further help. ation about dismissal and unfair dismissal, see Dismissal. You can make a claim to an employment tribunal, even if you haven39。t appealed against the disciplinary action your employer has taken against you. However, if you win your case, the tribunal may reduce any pensation awarded to you as a result of your failure to appeal. Remember that in most cases you must make an application to an employment tribunal within three months of the date when the event you are plaining about happened. If your application is received after this time limit, the tribunal will not usually accept i. If you are worried about how the time limits apply to you If you are being represented by a solicitor at the tribunal, they may ask you to sign an agreement where you pay their fee out of your pensation if you win the case. This is known as a damagesbased agreement. In England and Wales, your solicitor can39。t charge you more than 35% of your pensation if you win the case. you39。re clear about the terms of the agreement. It might be best to get advice from an experienced adviser, for example, at a Citizens Advice Bureau. To find your nearest CAB, including those that give advice by , click on nearest CAB. For more information about making a claim to an employment tribunal, see Employment tribunals. The (lack of) air up there Cay man Islandsbased Webb, the Watch m head of Fifa39。s antiracism taskforce, is in London for the Football Association39。s 150th anniversary celebrations and will attend City39。s Premier League match at Chelsea on Sunday. I am going to be at the match tomorrow and I have asked to meet Ya ya Toure, he told BBC Sport. For me it39。s about how he felt and I would like to speak to him first to find out what his experience was. Uefa has opened disciplinary proceedings against CSKA for the racist behaviour of their fans during City39。s 21 win. Michel Platini, president of European football39。s governing body, has also ordered an immediate investigation into the referee39。s actions. CSKA said they were surprised and disappointed by Toure39。s plaint. In a statement the Russian side added: We found no racist insults from fans of CSKA. Age has reached the end of the beginning of a word. May be guilty in his seems to passing a lot of different life became the appearance of the same day。 May be back in the past, to oneself the paranoid weird belief disillusionment, these days, my mind has been very messy, in my mind constantly. Always feel oneself should go to do something, or write something. Twenty years of life trajectory deeply shallow, suddenly feel something, do it. 一字開頭的年齡已經(jīng)到了尾聲?；蛟S是愧疚于自 20 己似乎把轉(zhuǎn)瞬即逝的很多個(gè)不同的日子過成了同一天的樣子；或許是追溯過去，對(duì)自己那些近乎偏執(zhí)的怪異信念的醒悟 ，這些天以來，思緒一直很凌亂，在腦海中不斷糾纏。總覺得自己似乎應(yīng)該去做點(diǎn)什么，或者寫點(diǎn)什么。二十年的人生軌跡深深淺淺，突然就感覺到有些事情，非做不可了。 The end of our life, and can meet many things really do? 而窮盡我們的一生，又能遇到多少事情是真正地非做不可？ During my childhood, think lucky money and new clothes are necessary for New Year, but as the advance of the age, will be more and more found that those things are optional。 Junior high school, thought to have a crush on just means that the real growth, but over the past three years later, his writing of alumni in peace, suddenly found that isn39。t really grow up, it seems is not so important。 Then in high school, think don39。t want to give vent to out your inner voice can be in the high school children of the feelings in a period, but was eventually infarction when graduation party in the throat, later again stood on the pitch he has sweat profusely, looked at his thrown a basketball hoops, suddenly found himself has already can39。t remember his appearance. 童年時(shí)，覺得壓歲錢和新衣服是過年必備，但是隨著年齡的推進(jìn)，會(huì)越來越發(fā)現(xiàn)，那些東西根本就可有可無；初中時(shí)，以為要有一場暗戀才意味著真正的成長，但三年過去后，自己心平氣和的寫同學(xué)錄的時(shí)候，突然就 發(fā)現(xiàn)是不是真正的成長了，好像并沒有那么重要了；然后到了高中，覺得非要吐露出自己的心聲才能為高中生涯里的懵懂情愫劃上一個(gè)句點(diǎn)，但畢業(yè)晚會(huì)的時(shí)候最終還是被梗塞在了咽喉，后來再次站在他曾經(jīng)揮汗如雨的球場，看著他投過籃球的球框時(shí)，突然間發(fā)現(xiàn)自己已經(jīng)想不起他的容顏。 Originally, this world, can produce a chemical reaction to an event, in addition to resolutely, have to do, and ，這個(gè)世界上，對(duì)某 個(gè)事件能產(chǎn)生化學(xué)反應(yīng)的，除