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外文翻譯---基于標(biāo)準(zhǔn)化的數(shù)字處理信息的plc軟件的自動生成-plc設(shè)計(留存版)

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【正文】 化工廠的目標(biāo)和方法的簡短 的 描述,列出了基于數(shù)字規(guī)劃信息的 PLC 編程的步驟。通過這個增強(qiáng)的進(jìn)程模型和一個西門子開發(fā)的軟件翻譯器即可生成一個 PLC 編程工具 STEP 7 的可執(zhí)行 PLC 程序。 Osmers 所 開發(fā)的這個軟件 的 專用 傳輸 的概念可以由虛擬現(xiàn)實工具 VRT(Superscape 有限公司 )以及 PLC 編程工具 STEP 7(西門子 )來實現(xiàn)。最后,給出了 這種 新方法 應(yīng)用 改進(jìn)的商業(yè)軟件 工具 的應(yīng)用實例。因此 ,鑒于 汽車產(chǎn)業(yè)實體店需要的特殊關(guān)注,一個基于標(biāo)準(zhǔn)化數(shù)字處理信息的全自動 PLC 軟件生成的概念被引入了。本文中介紹的全自動 PLC軟件生成的新方法便能夠為同時工程做出 重 大 貢獻(xiàn)。全自動 PLC 代碼生成的基礎(chǔ)是電子元件 (傳感器,致動器 )。 PLC 軟件自動化生成的基礎(chǔ)是一個數(shù)字三維單元模型和本單元的數(shù)字化進(jìn)程描述。 ?可維護(hù)的 PLC 程序代碼 必須以可讀易理解的格式來生成 PLC 代碼以便未來在軟件代碼上的更改,因此,圖形化 SFC 或 FBD( FBD:功能框圖)比隱秘語言 IL 合適的多。 圖 1.使用集成進(jìn)程規(guī)劃的目標(biāo) 集成的進(jìn)程規(guī)劃以圖形的方式描述了串行和并行生產(chǎn)的 工藝流程 ,因此,參考IEC 61131 給出了相似的序列功能表,但是從集成的進(jìn)程規(guī)劃中自動生成足夠的 PLC程序,還需要 額外的進(jìn)程元素和屬性。 在集成的進(jìn)程規(guī)劃中有 PLC 功能塊的這 幾種資源 聯(lián)系到相應(yīng)的進(jìn)程元素上,這樣每道工序“知道” 執(zhí)行的是什么資源 。 圖 3.從進(jìn)程規(guī)劃到 SFC Q:質(zhì)疑 FB:功能塊 BO:布爾操作數(shù) 聯(lián)合的進(jìn)程與資源模型 PLC 程序( SFC 和功能塊) 活動 1 特點 資源 過渡 1 特點 資源 BO 步驟 1 PLCFB Q 變量 1 BO 變量 2 變量 Q 變量 變量 PLCFB 這些功能塊通常是標(biāo)準(zhǔn)的,經(jīng)過測試的,對大多數(shù)資源部件可用,因此,只有為了之后 PLC 軟件生成在進(jìn)程序列與 PLC 功能塊之間的聯(lián)系是由 連接 進(jìn)程和資源建立的。 他們也可以 從一個統(tǒng)一的數(shù)據(jù)庫 中獲取并從那 插入 PLC 項目。 Technology Function and Production Modeling (GR/EPF) Ulm / Germany Abstract In order to meet the various challenges in the automotive industry, new and integrated methodologies for production planning and rampup processes are required. Thus, a concept for automated PLC software generation based on standardized digital process information is introduced with the special focus on the needs of the body shop in the automotive industry. The foundation for PLC software generation is a digital process plan that describes the production steps in a graphical way. For the special needs of PLC software generation new process elements and attributes are introduced. So the process plan contains the stepwise specialization of all necessary information for a PLC program. This paper additionally presents a specification extending the digital process information with resourcespecific PLC function blocks. 1. Introduction Due to the increasing petition for key market shares, car manufacturers are engaged in an innovation race characterized by a soaring number of product variants. In parallel, the innovation and model cycles are constantly decreased. These intensified petitive conditions inevitably lead to higher plexity both in overall production planning and in rampup processes. Moreover, the time for the future acplishment of production engineering projects has been cut to the bone. Today, the activities in the production planning process (mechanical design, electrical design, control engineering) are acplished in a most sequential way. Especially the tasks of the control engineering do not begin before the mechanical design is nearly pleted. In addition to that there is a deep gap between mechanical design and control engineering. This phenomenon is shown especially in different working methodologies, tools, and in the use of different, departmentspecific terms. The results of these departmentspecific differences inevitably lead to loss of information, repeated manual inputs, additionally iteration loops as well as high time pressure for the PLC project (PLC: Programmable Logic Controller). In order to cope with these challenges new planning methodologies are necessary to encourage simultaneous engineering. As one important contribution, a new methodology for automated PLC software generation is introduced in this paper. To give an overview, the paper starts with a short description of important and representative approaches regarding this topic. Based on the identified advantages and disadvantages of the existing approaches, requirements towards a new and integrated methodology for automated PLC software generation are described. After a short introduction of the concept of digital factory, the new methodology fulfilling the mentioned requirements is presented. The several steps from the digital process plan to an IEC 611313 conform PLC program are described. Finally, the practical applicability of the new methodology is shown using adapted and enhanced mercial software tools. 2. Existing approaches for automated PLC software generation In the following sections different representative approaches for automated PLC software generation are presented. Moreover, the conceptspecific advantages and disadvantages are worked out. . DFG project DisPa (Distributed Process Automation) Within the research project DisPa an objectoriented methodology was developed that allows the generation of executable PLC software code based on an abstract, systemneutral model [1]. This model is developed with an extension of the formal description language UML (UML: Unified Modeling Language) that was adapted to the special requirements of control engineering. By the use of UML a modular and structured model developing is guaranteed. To support accelerated and transparent engineering processes standardized and reusable software ponents are used. The concept of UMLbased PLC software generation was implemented using an elementary example of screening plant with 28 sensors and 19 actors. With a special developed software translator the UML model is translated to IEC 611313 conform PLC software code. Afterwards this code is imported as Structured Text (ST) in the PLC programming tool CoDeSys [1]. . Automated PLC software generation based on Petri Nets In [2] and [3] a concept for automated PLC software generation based on Signal Interpreted Petri Nets(SIPN) is presented. The basic idea is similar to the UMLapproach from the research project DisPa. Analog to the formal description language UML, SIPN allows a transparent graphical description of process oriented control algorithms. With special software translators these SIPN can be translated in executable IL code (IL: Instruction List). For prototypical applicability a demonstrator was developed that creates IL code from SIPN related to PLC open
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