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傳輸?shù)酵鈬O(shè)備單元 自動(dòng)控制功能: ? 通過(guò) CAEX+按照 IEC 611313協(xié)議創(chuàng)建的可自由定義的擁有開(kāi)閉環(huán)控制功能的用戶程序 512KB的用戶程序空間 大約 50000個(gè)可變信號(hào)源 ,2020個(gè)常用信號(hào)源 10ms的循環(huán)時(shí)間 網(wǎng)上測(cè)試 可隨時(shí)下載 ? 冗余的開(kāi)閉環(huán)功能控制 通過(guò)冗余線路進(jìn)行同步 通過(guò) Ax 1703外圍設(shè)備串口總線在開(kāi)閉環(huán)控制功能與外圍接口單元之間不斷傳輸處理信息 。可升級(jí)的性能與多種冗余結(jié)構(gòu),使得 AK1703 ACP可以完美處理各種功能要求。因此,統(tǒng)計(jì)學(xué)可以作為可編程邏輯控制器( PLC)設(shè)計(jì)的一個(gè)例子,并有可能影響邏輯硬件設(shè)計(jì)。設(shè)計(jì)過(guò)程一般都分成局部功能塊設(shè)計(jì)和系統(tǒng)設(shè)計(jì)兩個(gè)階段。尤其是,對(duì)如何簡(jiǎn)化一個(gè)繁冗而復(fù)雜的設(shè)計(jì)任務(wù)這一問(wèn)題,仍然沒(méi)有被科學(xué)的處理。百分之八十到九十的花費(fèi)用于軟件維護(hù)、調(diào)試、優(yōu)化(改進(jìn))、和擴(kuò)展以滿足不斷變換的需求。其次,軟件變得難以掌握其程度的復(fù)雜;在現(xiàn)代自動(dòng)化系統(tǒng)中,軟件設(shè)計(jì)和保持系統(tǒng)本質(zhì)幾乎變得不可能。同樣的,它也將改善軟 件的質(zhì)量的可靠性,以及關(guān)系到系統(tǒng)的較高安全標(biāo)準(zhǔn),尤其是這些對(duì)環(huán)境有危害影響的,比如:機(jī)場(chǎng)控制、公共鐵路運(yùn)輸。 IEC611313, 1993。例如,可編程邏輯控制器(PLC)程序仍然依靠一種方便的有邏輯梯形圖的程序?qū)崿F(xiàn)模式。特別的,這個(gè)主題與隨后的部分的是有關(guān)的。公式描述對(duì)被控制的系統(tǒng)的行為提供一個(gè)精確的描述。使用純電源意味著工業(yè)環(huán)境中的電源不會(huì)嚴(yán)重影響它。用戶必須確定從 I/O模塊取出多大電流來(lái)保證電源提供適當(dāng)?shù)碾娏?。正確的、備有證明文件的梯形圖使任何技術(shù)人員都能徹底理解系統(tǒng)的功能。添加注釋和標(biāo)記可以使技術(shù)人員(不僅僅是開(kāi)發(fā)人員)很快理解梯形圖。這有助于避免車(chē)間發(fā)生危險(xiǎn)情況(一些汽車(chē)制造商已經(jīng)建立了通信網(wǎng)絡(luò),可以定期檢查 PLC中的程序,以保證運(yùn)行的程序都是正確的)。今天的傳輸計(jì)算機(jī)是工廠自己對(duì) PLC控制器進(jìn)行重新編程的理想設(shè)備。另外一部分存儲(chǔ)器用來(lái)存儲(chǔ)用戶程序中的變量的內(nèi)容。 用戶存儲(chǔ)器被分成具有特殊功 能的塊??觳列痛鎯?chǔ)器( FLASH memory)的內(nèi)容只有在改變用戶程序的時(shí)候可以被改變。你會(huì)發(fā)現(xiàn)大部分由日本制造商制造的 PLC中是日立和 Fujicu的微控制器 ,西門(mén)子的微控制器多應(yīng)用在歐洲的PLC中 ,摩托羅拉生產(chǎn)的微控制器則獨(dú)占美國(guó)市場(chǎng)。 CPU速 度和內(nèi)存容量是 PLC的重要參數(shù),它們決定著 PLC的工作速度, IO數(shù)量及軟件容量等,因此限制著控制規(guī)模。 CPU的控制器控制 CPU工作,由它讀取指令、解釋指令及執(zhí)行指濱州學(xué)院 專(zhuān) 科畢業(yè)設(shè)計(jì) (外文翻譯 ) 12 令。 三、現(xiàn)今的 PLC 從結(jié)構(gòu)上分, PLC分為固定式和 模塊式兩種。這個(gè)設(shè)計(jì)方法論包括以狀態(tài)轉(zhuǎn)換模型為基礎(chǔ)的精確的描述,這個(gè)轉(zhuǎn)臺(tái)轉(zhuǎn)換模型是自動(dòng)控制系統(tǒng)的抽象系統(tǒng)。在許多的工業(yè)設(shè)計(jì)工程中,多數(shù)人力分配給了控制系統(tǒng)設(shè)計(jì)和安裝,并且他們被要求對(duì) PLC進(jìn)行程序測(cè)試和錯(cuò)誤排除。 一般來(lái)說(shuō),和其他領(lǐng)域相比生產(chǎn) PLC的周期要短很多。 Morley在演講中著重強(qiáng)調(diào)了這個(gè)方面。 雖然計(jì)算機(jī)控制技術(shù)已經(jīng)產(chǎn)生,但是 PLC控制因?yàn)樗母咝阅?、成本低、并且?duì)惡劣的環(huán)境有很強(qiáng)的適應(yīng)能力而在工業(yè)控制的廣泛應(yīng)用中保持優(yōu)勢(shì)。目前,可編程控制器已成為工廠自動(dòng)化的強(qiáng)有力工具,得到了廣泛的普及推廣應(yīng)用。國(guó)際電工委員會(huì) (IEC)頒布的可編程控制器標(biāo)準(zhǔn)草案中對(duì)可編程控制器作了如下的定義:可編程控制器是一種數(shù)字運(yùn)算操作的電子系統(tǒng),專(zhuān)為在工業(yè)環(huán)境下應(yīng)用而設(shè)計(jì)。提出 PLC概念的是美國(guó)通用汽車(chē)公司。 ISO 157451, 1999] have been formed to fix and disseminate stateoftheart design methods, but they normally cannot participate in advancing the knowledge of efficient program and system design. A systematic approach will increase the level of design automation through reusing existing software ponents, and will provide methods to make largescale system design manageable. Likewise, it will improve software quality and reliability and will be relevant to systems high security standards, especially those having hazardous impact on the environment such as airport control, and public railroads. The software industry is regarded as a performance destructor and plexity generator. Steadily shrinking hardware prices spoils the need for software performance in terms of code optimization and efficiency. The result is that massive and less efficient software code on one hand outpaces the gains in hardware performance on the other hand. Secondly, software proliferates into plexity of unmanageable dimensions。 畢業(yè)設(shè)計(jì)(外文翻譯) 英文題目 The development and future of PLC 中文題目 PLC 的發(fā)展和未來(lái) 系 (院) 自動(dòng)化系 專(zhuān) 業(yè) 電氣自動(dòng)化技術(shù) 學(xué)生姓名 學(xué)生姓名 學(xué)生姓名 學(xué)生姓名 學(xué)生姓名 學(xué) 號(hào) 學(xué) 號(hào) 學(xué) 號(hào) 學(xué) 號(hào) 學(xué) 號(hào) 指導(dǎo)教師 職 稱(chēng) 二 〇 一三 年 六 月 濱州學(xué)院 專(zhuān) 科畢業(yè)設(shè)計(jì) (外文翻譯 ) 1 The development and future of PLC Part 1 PLC overview Programmable controller is the first in the late 1960s in the United States, then called PLC programmable logic controller (Programmable Logic Controller) is used to replace relays. For the implementation of the logical judgment, timing, sequence number, and other control functions. The concept is presented PLC General Motors Corporation. PLC and the basic design is the puter functional improvements, flexible, generic and other advantages and relay control system simple and easy to operate, such as the advantages of cheap prices bined controller hardware is standard and overall. According to the practical application of target software in order to control the content of the user procedures memory controller, the controller and connecting the accused convenient target. In the mid1970s, the PLC has been widely used as a central processing unit microprocessor, import export module and the external circuits are used, largescale integrated circuits even when the PLC is no longer the only logical (IC) judgment functions also have data processing, PID conditioning and data munications functions. International Electro technical Commission (IEC) standards promulgated programmable controller for programmable controller draft made the following definition : programmable controller is a digital electronic puters operating system, specifically for applications in the industrial design environment. It used programmable memory, used to implement logic in their internal storage operations, sequence control, timing, counting and arithmetic operations, such as operating instructions, and through digital and analog input and output, the control of various types of machinery or production processes. Programmable controller and related peripherals, and industrial control systems easily linked to form a whole, to expand its functional design. Programmable controller for the user, is a noncontact equipment, the procedures can be changed to change production processes. The programmable controller has bee a powerful tool for factory automation, widely popular replication. Programmable controller is useroriented industries dedicated control puter, with many distinctive features. 濱州學(xué)院 專(zhuān) 科畢業(yè)設(shè)計(jì) (外文翻譯 ) 2 Part 2 History of PLC Programmable Logic Controllers (PLC), a puting device invented by Richard E.