A16B-1210-0280A16B-1210-0280A06B-6089-H206
工業(yè)以太網(wǎng)是將以太網(wǎng)作為現(xiàn)場(chǎng)設(shè)備的控制網(wǎng)絡(luò)平臺(tái)，它不僅在辦公自動(dòng)化領(lǐng)域而且在工業(yè)自動(dòng)化場(chǎng)合得到了廣泛應(yīng)用，許多如控制器、PLC、智能儀表、執(zhí)行器以及DCS系統(tǒng)已經(jīng)帶有以太網(wǎng)接口，這些都標(biāo)志著工業(yè)以太網(wǎng)已經(jīng)成為真正開放互連的工業(yè)網(wǎng)絡(luò)的發(fā)展方向。工業(yè)以太網(wǎng)在傳統(tǒng)以太網(wǎng)技術(shù)的基礎(chǔ)上，通過采用雙工通信、交換機(jī)、信息優(yōu)先級(jí)等技術(shù)，使有實(shí)時(shí)要求站點(diǎn)的通信通過交換機(jī)實(shí)現(xiàn)透明的轉(zhuǎn)發(fā)，不存在信道共享引起的競(jìng)爭(zhēng)問題，還可以方便地實(shí)現(xiàn)優(yōu)先級(jí)排隊(duì)機(jī)制，使緊急信息的傳送達(dá)到最快。采用以太網(wǎng)集線器可使實(shí)時(shí)數(shù)據(jù)的延遲時(shí)間控制在200ms范圍之內(nèi)，并在以太網(wǎng)的協(xié)議中加入實(shí)時(shí)功能，采用高速背板交換或微處理器交換，響應(yīng)時(shí)間是確定的，足以滿足2005／V大多數(shù)場(chǎng)合的實(shí)時(shí)控制要求。工業(yè)以太網(wǎng)成本低，速度高達(dá)1Gb／s。因此，工業(yè)以太網(wǎng)將在車間現(xiàn)場(chǎng)設(shè)備控制中發(fā)揮重要作用，對(duì)車間數(shù)字設(shè)備的網(wǎng)絡(luò)化控制模式產(chǎn)生很大的影響
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