MA Dedham消息，根據(jù)ARC咨詢集團(tuán)的最新研究：“將信號(hào)通訊繼續(xù)向下延伸到企業(yè)架構(gòu)中”一文表明，工業(yè)以太網(wǎng)轉(zhuǎn)向了設(shè)備及自動(dòng)化網(wǎng)絡(luò)領(lǐng)導(dǎo)層次的I/O級(jí)?；谠O(shè)備和I/O級(jí)的全球市場(chǎng)，在未來(lái)5年里，預(yù)計(jì)提高年均復(fù)合增長(zhǎng)率（CAGR）27.5％。在控制工程關(guān)于工業(yè)以太網(wǎng)協(xié)議的調(diào)查中，有63％的調(diào)查者都是在I/O級(jí)應(yīng)用以太網(wǎng)的。那么有多少個(gè)節(jié)點(diǎn)呢？ ARC調(diào)查顯示2007年的市場(chǎng)總量超過(guò)1百萬(wàn)結(jié)點(diǎn)，其預(yù)言到2012年將會(huì)增長(zhǎng)到3百萬(wàn)個(gè)節(jié)點(diǎn)。目前，主要的還是用在自動(dòng)化控制的高級(jí)領(lǐng)導(dǎo)層面，產(chǎn)品可靠性中的自動(dòng)化適用標(biāo)準(zhǔn)、智能執(zhí)行戰(zhàn)略和整體性能改善，使以太網(wǎng)在許多要求的過(guò)程控制應(yīng)用中成為關(guān)鍵性的選擇，對(duì)成長(zhǎng)潛力更為重要的是市場(chǎng)對(duì)以太網(wǎng)的公用性的重視大于其公開性。 ARC 副總裁，也是ARC基于設(shè)備網(wǎng)絡(luò)的以太網(wǎng)全球前景展望的作者Chantal Polsonetti說(shuō)：“ IEEE802.3中以太網(wǎng)協(xié)議棧層1和層2標(biāo)準(zhǔn)化，使得現(xiàn)成的物理層產(chǎn)品得到廣泛應(yīng)用，并成為OEMs和終端用戶熟知的產(chǎn)品，但卻一直被視為工業(yè)自動(dòng)化部分應(yīng)用中的容器。每一個(gè)主要的提供商都想支持他們自己的高級(jí)協(xié)議。對(duì)于用戶來(lái)說(shuō)，此種轉(zhuǎn)移可在企業(yè)中轉(zhuǎn)化到普通物理層，但是多重競(jìng)爭(zhēng)協(xié)議在卻在自動(dòng)化層?！? 能使垂直整合在相同網(wǎng)絡(luò)上通過(guò)企業(yè)實(shí)現(xiàn)的網(wǎng)絡(luò)技術(shù)，至少在網(wǎng)絡(luò)協(xié)議棧的最低層，此種技術(shù)被認(rèn)為是對(duì)生產(chǎn)商具有同等價(jià)值的建議。具ARC調(diào)查顯示，簡(jiǎn)易網(wǎng)絡(luò)整合和構(gòu)造/配置，及少數(shù)昂貴的、平坦架構(gòu)和企業(yè)－寬泛數(shù)據(jù)交換，都可被用于從過(guò)程優(yōu)化到資產(chǎn)管理的多重目，并且現(xiàn)在都可實(shí)現(xiàn)，研究公司還將繼續(xù)對(duì)此的研究。基于配置、安裝、維護(hù)和故障修理的技術(shù)基礎(chǔ)，可減少專業(yè)人員的需要，提供寬泛的技術(shù)基礎(chǔ)和更易實(shí)現(xiàn)的培訓(xùn)和支持。以太網(wǎng)的全球?qū)嵱眯院椭С?，通過(guò)關(guān)鍵的IT和自動(dòng)化提供商就能使其比專業(yè)的工業(yè)網(wǎng)絡(luò)更具吸引力。 降低對(duì)開放性的重視加強(qiáng)工業(yè)以太網(wǎng)中的公用性，在嵌入式應(yīng)用網(wǎng)絡(luò)中都是可見的，也即私有協(xié)議典型應(yīng)用的地方。此外，在運(yùn)動(dòng)控制中，工業(yè)以太網(wǎng)被應(yīng)用在單個(gè)提供商應(yīng)用中時(shí)，不要求采用來(lái)自不同提供商的即插即用元件具有此種性能。 [FONT=times] original text [/FONT] [font=times][Color=#708090]Dedham, MA — Industrial Ethernet’s migration into the device or I/O level of the automation network hierarchy “signals its continued march downward in the enterprise architecture,” according to a new ARC Advisory Group study. The global market for Ethernet-based devices and I/O is predicted to increase at a compounded annual growth rate （CAGR） of 27.5% over the next five years. A Control Engineering survey on industrial Ethernet protocols showed 63% of respondents use Ethernet at the I/O level. How many nodes? ARC says market size in 2007 totaled more than 1 million nodes; it is forecast to increase to more than 3 million nodes by 2012. Currently a staple at the control level of automation hierarchy, automation-applicable standards, intelligent implementation strategies, and overall improvements in product reliability have made Ethernet a key option in the most demanding motion control applications, ARC says; more important to growth potential is market emphasis on Ethernet’s commonality rather than its openness. “Standardization of layers 1 and 2 of the Ethernet stack in IEEE 802.3 makes commercial off the shelf （COTS） physical layer products widely available and familiar to potential OEMs and end users, but, as always seems to be the case in the industrial automation segment, each major supplier wants to support their own higher-level protocols,” said ARC vice president Chantal Polsonetti, principal author of ARC’s Ethernet-based Device Networks Worldwide Outlook. “For the customer, this translates to common physical layer components throughout the enterprise but multiple competing protocols at the automation layer.” One network technology that enables vertical integration throughout the enterprise over the same network, at least at lower tiers of the network stack, is described as a compelling value proposition for manufacturers, ARC says. Easy network integration and configuration/reconfiguration and the potential for less expensive, flatter architectures and enterprise-wide data exchange that can be used for multiple purposes from process optimization to asset management are now possible, the research firm continues. A common skill base for configuration, installation, maintenance, and troubleshooting reduces need for specialized personnel and provides a broader skill base and more accessible training and support. Ethernet’s global availability and support by key IT and automation vendors makes it more attractive than dedicated industrial networks, ARC says. Evidence of reduced emphasis on openness versus commonality in industrial Ethernet is seen in the network in embedded applications, where proprietary protocols typically are in use, ARC says, adding that, in motion control, industrial Ethernet is being adopted in single-vendor applications that don’t require the ability to plug-and-play components from different suppliers. [/color][/font]