外文翻譯--plc控制系統(tǒng)設(shè)計(jì)的要點(diǎn)-plc設(shè)計(jì)(文件)
【正文】 is is a technical staff chosen Plc important reasons. Then, how to purchase Plc products? First, the system should first determine the size of single control system with Plc or using Plc working, thus calculating Plc importing, exporting. Few, and in some Plc to be in real need have a certain cushion Second, determine the type of load under Plc exportled type of load is the DC or exchangetype, big or small currents, and Plc export points such as the frequency of movements, the use of relays to determine exportexport, or transistor output, or goods of export gates. Different load choose different ways to export to the operating system39。 At the same time, some manufacturers of individual products do not support the expansion module directives, in software development, we must pay attention to. When using such simulation module temperature, some of the manufacturers, see related technical manuals. Many types of panies expansion modules, such as singleinput modules, single output modules, input output modules, temperature modules, highspeed input module. This modular design Plc product development provided for the convenience of users. When using a Plc work design, its much more difficult to control than single Plc. First you should choose their own more familiar type, its basic instructions and a more indepth understanding of the functional mands, and the speed and direction of the implementation of storage capacity users should also be careful about the procedure. Otherwise, you can not adapt to the realtime requirements, resulting in the collapse of the system. In addition to munications interfaces, munication protocols, data transmission speed should also be considered. Finally, we must seek to Plc businessmen work design and software technical support and detailed technical information for the selection of several workstations in your system size. In the preparation of the software, should first bee familiar with the use of Plc software products specification, the question skilled later programming. If using graphical programming device or software package programming may direct programming, if using handheld programming device programming, should be painted Trapezoid Chart before programming, so can less mistakes speed was fast. After the first air conditioning programming procedures to be normal functioning of all, again in equipment debugging. PLC 控制系統(tǒng)設(shè)計(jì)的要點(diǎn) 可編程序控制器 (可設(shè)計(jì)的控制器 ) 本來應(yīng)簡(jiǎn)稱個(gè)人計(jì)算機(jī)，為了與個(gè)人計(jì)算機(jī)的簡(jiǎn)稱個(gè)人計(jì)算機(jī)相區(qū)別 ,一般將它簡(jiǎn)稱為 PLC(可設(shè)計(jì)的邏輯控制器 )。 計(jì)算機(jī)代替了一個(gè)過程控制所需的許多外部配線。 微 PLC 數(shù)年以前進(jìn)入了市場(chǎng)，一些人認(rèn)為這些裝置 降到最低點(diǎn) 。這些 PLCs 主要安裝在汽車的植物中。重新規(guī)劃程序的 PLC 鍵盤代替了大量電線，繼電器 , 定時(shí)器的配線和其他的元件 .新的 PLC 讓轉(zhuǎn)換時(shí)間變成大約幾天。 所有類型的機(jī)器人，自動(dòng)化 裝置和計(jì)算機(jī)，包括 PLC, 都有了許多進(jìn)步 。 PLC 的市場(chǎng)已經(jīng)從 1978 年八千萬元開始到 1990 年以每年十億元的幅度增長(zhǎng)而且仍然正在增加。 一個(gè)在繼電器邏輯系統(tǒng)方面有豐富知識(shí)的人 ,能在很短的時(shí)間內(nèi)掌握主要的 PLC 功能 , 這些功能可能 包括盤繞卷，接觸器，定時(shí)器和計(jì)數(shù)器。 學(xué)校和操作手冊(cè)在掌握這些先進(jìn)的功能方面非常有幫助。 過去 , 每個(gè)不同的電子受約束的生產(chǎn)機(jī)器需要自己的控制器； 15 部機(jī)器可能需要 15 個(gè)不同的控制器。 當(dāng)改變一個(gè) PLC 編程線路或序列設(shè)計(jì)的時(shí)候 , PLC 編程能在數(shù)分鐘內(nèi)從鍵盤序列中改變。 有需要花時(shí)間去設(shè)計(jì)和安裝新的繼電器和繼電器觸點(diǎn) . 使用 PLC ，不過只有三個(gè)多觸點(diǎn)。 增加的技術(shù)濃縮較多的功能為較小的和不貴的包。 程序能被打印，測(cè)試，觀察，而且如果需要可以修正 , 節(jié)約了工廠的時(shí)間。當(dāng)他們被激活時(shí)，邏輯路徑在熒屏上顯示。 先進(jìn)的 PLC 系統(tǒng)也可能有每個(gè)線路元件的功能描述。 PLC 編程被一個(gè)電學(xué)家或技術(shù)人員在梯型圖中完成。近幾年， PLC 產(chǎn)品 的價(jià)格有較大的下降，其性價(jià)比越來越高，這是眾多技術(shù)人員選用 PLC 的重要原因。不同的負(fù)載選用不同的輸出方式，對(duì)系統(tǒng)的穩(wěn)定運(yùn)行是很重要的 。一般存儲(chǔ)容量越大、速度越快的 PLC 價(jià)格就越高，但應(yīng)該根據(jù)系統(tǒng)的大小合理選用 PLC 產(chǎn)品。 用 IBM 個(gè)人計(jì)算機(jī)加 PLC 軟件包編程，這種方式是效率最高的一種方式，但大部分公司的 PLC開發(fā)軟件包價(jià)格
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