外文翻譯--可編程邏輯控制器（plc）的現(xiàn)況和發(fā)展趨勢-預(yù)覽頁
【正文】 ork from the information into realtime control work is the head The direction of the previous efforts. In fact, Rockwell Automation can be used Ether control. GE in the new system to control the use of Ether I/O 100ns to plete Ether Net/IP the clock synchronization. Can be used SOE records, including applications, including highprecision. IP has been A wireless work adapter can be distributed through the wireless Ether control System which is difficult to install wiring environment very attractive. Currently on the market Also did not release the servo control Ether products but many manufacturers are developing. Some manufacturers have prototype. PLC manufacturers actively control the process The field of system development. Rockwell Automation to acquire ICS (in Advanced process control algorithm leads!. Another major trend is that the whole Factory unified solutions such as Rockwell Automation39。s Integrated Architecture can All of these control systems integration, and pletion of realtime data collected at the scene And realtime control. Users in an open environment, it is more conveniently Is the control of the whole plant, production and performance management. At the same time, because the building blocks of Structure. In short PLC response to the needs of enterprise integration, to the standardization, multifunction To the direction of the continuous development of applications continuing to expand functions are being constantly strengthened, Very optimistic about the prospects for development. 中文翻譯 可編程邏輯控制器（ PLC）的現(xiàn)況和發(fā)展趨勢 羅克韋爾自動(dòng)化 PLC的發(fā)展是提高生產(chǎn)力的要求推動(dòng)的。 AB(羅克韋爾自動(dòng)化收購 )、Modicon(PLC發(fā)明者之一，施耐德收購是早期著名的 PLC廠家。隨著電子技術(shù)、控制技術(shù)的發(fā)展， PLC從單純的數(shù)字量控制發(fā)展到簡單的模擬量控制和數(shù)字量控制相結(jié)合，部分替代了單回路儀表的功能。 PLC 廠家的解決方案是標(biāo)準(zhǔn)化、模塊化和網(wǎng)絡(luò)化。 IEC611313在數(shù)據(jù)結(jié)構(gòu)、程序結(jié)構(gòu)、編程語言和數(shù)據(jù)交換等方面制定了國際標(biāo)準(zhǔn)，新型的 PLC包括 DCS都參考這個(gè)標(biāo)準(zhǔn)進(jìn)行開發(fā)。 PLC在設(shè)計(jì)時(shí)就是面向工業(yè)環(huán)境的因此，可靠性和抗干擾能力都很強(qiáng)?？梢哉f沒有 PLC 就沒有現(xiàn)代制造業(yè)。它不僅可以實(shí)現(xiàn)順序控制功能，還可以實(shí)現(xiàn)過程控制、運(yùn)動(dòng)控制、傳動(dòng)控制、安全控制和批處理等。 PAC可以方便的和企業(yè)網(wǎng)集成，實(shí)現(xiàn)信息化工廠。并實(shí)現(xiàn)三種網(wǎng)絡(luò)的無縫連接是目前工業(yè)網(wǎng)絡(luò)架構(gòu)的典范。 EtherNet/IP采用標(biāo)準(zhǔn)的網(wǎng)絡(luò)協(xié)議和網(wǎng)絡(luò)設(shè)備。另一方面現(xiàn)有成熟的總線安裝保有量是非常大的，完全替換代價(jià)極大。因?yàn)樽枞菰鹊捏w積很難縮小而抗干擾措施需要這些分立元件。實(shí)際上，羅克韋爾自動(dòng)化已經(jīng)可以使用以太網(wǎng)進(jìn)行控制。目前市場上還用沒有發(fā)布以太網(wǎng)伺服控制產(chǎn)品但是很多廠商都在開發(fā)，部分廠商已有樣機(jī)。 目前存在多種控制系統(tǒng)如工控機(jī)、 PLC 和 DCS 等。 PLC 越來越像 DCS 以至于很多設(shè)計(jì)人員無法從功能上區(qū)分，僅僅根據(jù)生產(chǎn)廠區(qū)分。在功能方面只有某些在 PLC基礎(chǔ)之上發(fā)展起來的 PAC系統(tǒng)才能夠滿足全廠控制的要求。我國也有相應(yīng)的經(jīng)費(fèi)支持企業(yè)融合的研究課題，很多行業(yè)已經(jīng)開始探索融合之路。用戶可以在開放的環(huán)境中，更加方便 地實(shí)現(xiàn)全廠的控制，生產(chǎn)和績效管理
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