【正文】 s rapid development, the programmable controller technology has widely applied in the automated control domain. Programmable controller by its redundant reliability and operation simple and so on characteristics, had already formed one industry tendency. At present, the programmable controller (PLC), the puteraided design/puter auxiliary manufacture (CAD/CAM), the robot (Rob) and the numerical control (NC) the technology has developed into the industrial automation four big prop technology. The programmable controller is one kind of new general automatic control device, it the traditional relay contact device control technology, the puter technology and the mechanics of munication merges into one anic whole, designs specially for the industrial control. This new general automatic control device by its redundant reliability, strong working conditions patibility and great convenience operational performance, depth automated domain technical personnel39。s and technology39。 由于本人已經(jīng)在外工作，這次的畢業(yè)論文我在時(shí)間上準(zhǔn)備得不是很充分 ,所以論文中必定有很多不全面的論述和觀點(diǎn)，在此就要感謝評(píng)閱老師對(duì)本論文進(jìn)行的認(rèn)真評(píng)閱和批評(píng)指正。此外，我還要感謝系上的領(lǐng)導(dǎo)和老師 對(duì)我的關(guān)心和幫助。彭老師為論文課題的研究提出了許多指導(dǎo)性的意見，為論文的撰寫、修改提供了許多具體的指導(dǎo)和幫助。 這次畢業(yè)設(shè)計(jì)使我收益匪淺，學(xué)到的知識(shí)讓我終生受用。我基本學(xué)會(huì)了 PLC設(shè)計(jì)的步聚和基本方法，在沒有做實(shí)踐設(shè)計(jì)以前，我知道的撐握的都是思想上的，對(duì)一些細(xì)節(jié)不加重視，當(dāng)我把自己想出來的程序與到 PLC中的時(shí)候，問題出現(xiàn)了，不是不能運(yùn)行，就是運(yùn)行的結(jié)果和要求的結(jié)果不相符合。由于平時(shí)大家都是學(xué)理論，沒有過實(shí)際開發(fā)設(shè)計(jì)的經(jīng)驗(yàn)，拿到的時(shí)候都不知道怎么做。我學(xué)會(huì)了 PLC的基本編程方法，對(duì) PLC的工作原理和使用方法也有了更深刻的理解。 Use procedure declaration Presses down forward start button SB, contact device KM1 results in the electricity and the selflocking, as a result of the timedelay switch KT1 function, the car will have 2 minutes stops insitu, then the electric motor rotation drives the car to move toward B points by A spot, when moves to the ST2 position, the car depresses right limit switch SQ2, SQ2 to move the break contact to cause the KM1 power failure, but the SQ2 front contact causes KM2 to result in the electricity movement and the selflocking, as a result of the timedelay switch KT2 function, the car pauses 2 minutes in B, then the electric motor reverse, drives the car to move toward A points by B spot, when the car depresses left limit switch SQ1, causes the KM2 power failure, KM1 the electricity movement,Such straight circulation gets down. PLC 型號(hào)的選擇 PLC型號(hào)為 FXos14MR001,根據(jù) I/O連接圖可知運(yùn)料小車的輸入與輸出點(diǎn)數(shù)的多少，而工業(yè)上大多數(shù)時(shí)候是用交流（ AC電源）所以 FXos14MR001這個(gè)型號(hào)的 PLC可以滿足設(shè)計(jì)要求。 工步狀態(tài)的邏輯表達(dá)式 根據(jù)功能圖直接寫出五個(gè)工步狀態(tài)的以 PLC 地址表達(dá)的邏輯式： 各執(zhí)行電器（即輸出信號(hào)）的邏輯表達(dá)式為： Y002=M1， T0=M1 Y000=M2 Y003=M3， T1=M3 Y001=M4 PLC 硬件 I/O連接圖 圖 35 用起保停電路控制步 a） b） 魏恩杰： PLC 運(yùn)料小車控制 第 14 頁 共 22 頁 根據(jù)設(shè)計(jì)要求畫出 I/O 連接圖，圖 中電動(dòng)機(jī)的功率為 3KW 圖 36 梯形圖 根 據(jù) 其 I/O 連 接 圖 使 用 FXGPWIN 軟 件 畫 出 其 梯 形 圖課件之家精心整理資料 歡迎你的欣賞 課件之家精心整理資料 歡迎你的欣賞 圖 37 生成 指令語句表 使用 FXGPWIN 軟件的轉(zhuǎn)換功能，生成下列語句表 0 LD M4 14 AND T0 28 ANI M0 1 AND X001 15 OR M2 29 ANI X003 2 OR M8002 16 ANI M3 30 OUT M4 3 OR M0 17 ANI X003 31 LD M1 4 ANI M1 18 OUT M2 32 OUT Y002 5 ANI X003 19 LD M2 33 OUT TO K1200 6 OUT M0 20 AND X002 36 LD M2 7 LD M0 21 OR M3 37 OUT Y000 8 AND X000 22 ANI M4 38 LD M3 9 OR M1 23 ANI X003 39 OUT Y003 10 ANI M2 24 OUT M3 40 OUT T1 K1200 11 ANI X003 25 LD M3 43 LD M4 12 OUT M1 26 AND T1 44 OUT Y001 13 LD M1 27 OR M4 45 END 魏恩杰： PLC 運(yùn)料小車控制 第 16 頁 共 22 頁 電氣控制主電路圖 根據(jù)設(shè)計(jì)要求在考慮安全的情況下畫出下列電氣控制主電路圖 u v w KM1 KM2