隨著Internet/Intranet的(de)發(fa)展(zhan)
，以(yi)太(tai)網(wang)已(yi)滲(shen)透(tou)到(dao)各(ge)個(ge)角(jiao)落(luo)，網(wang)絡(luo)上(shang)的(de)用(yong)戶(hu)已(yi)解(jie)除(chu)了(le)資(zi)源(yuan)地(di)理(li)位(wei)置(zhi)上(shang)的(de)束(shu)縛(fu)，在(zai)聯(lian)人(ren)互(hu)聯(lian)網(wang)的(de)任(ren)何(he)一(yi)台(tai)計(ji)算(suan)機(ji)上(shang)就(jiu)能(neng)瀏(liu)覽(lan)工(gong)業(ye)控(kong)製(zhi)現(xian)場(chang)的(de)數(shu)據(ju)，實現“控管一體化”，這是其他任何一種現場總線都無法比擬的。

　　yitaiwangdeyinrenjiangweikongzhixitongdehouxufazhantigongkenengxing，yonghuzaijishushengjifangmianwuxuduzideyanjiutouren，duiyuzheyidian，renhexianyoudexianchangzongxianjishudoushiwufabinide。tongshi，jiqirenjishu
、智能技術的發展都要求通信網絡具有更高的帶寬和性能，通信協議有更高的靈活性，這些要求以太網都能很好地滿足。

　　雖(sui)然(ran)工(gong)業(ye)以(yi)太(tai)網(wang)在(zai)一(yi)些(xie)行(xing)業(ye)的(de)應(ying)用(yong)上(shang)已(yi)經(jing)真(zhen)正(zheng)實(shi)現(xian)了(le)一(yi)網(wang)到(dao)底(di)，但(dan)對(dui)於(yu)另(ling)一(yi)些(xie)行(xing)業(ye)
，現(xian)場(chang)總(zong)線(xian)和(he)工(gong)業(ye)以(yi)太(tai)網(wang)將(jiang)會(hui)並(bing)存(cun)多(duo)年(nian)。現(xian)場(chang)總(zong)線(xian)和(he)工(gong)業(ye)以(yi)太(tai)網(wang)是(shi)當(dang)前(qian)工(gong)業(ye)控(kong)製(zhi)應(ying)用(yong)中(zhong)普(pu)遍(bian)采(cai)用(yong)的(de)兩(liang)個(ge)技(ji)術(shu)。雖(sui)然(ran)多(duo)種(zhong)現(xian)場(chang)總(zong)線(xian)技(ji)術(shu)之(zhi)間(jian)存(cun)在(zai)互(hu)不(bu)兼(jian)容(rong)

，不(bu)同(tong)公(gong)司(si)的(de)控(kong)製(zhi)器(qi)之(zhi)間(jian)不(bu)能(neng)實(shi)現(xian)高(gao)速(su)實(shi)時(shi)數(shu)據(ju)傳(chuan)輸(shu)
，以(yi)及(ji)信(xin)息(xi)網(wang)絡(luo)存(cun)在(zai)協(xie)議(yi)上(shang)的(de)鴻(hong)溝(gou)等(deng)導(dao)致(zhi)的(de) “自動化孤島”等問題。但在控製網絡中，網絡故障的快速恢複、本(ben)質(zhi)安(an)全(quan)等(deng)問(wen)題(ti)依(yi)然(ran)是(shi)製(zhi)約(yue)以(yi)太(tai)網(wang)全(quan)麵(mian)應(ying)用(yong)的(de)主(zhu)要(yao)障(zhang)礙(ai)。因(yin)此(ci)，一(yi)般(ban)在(zai)設(she)備(bei)層(ceng)仍(reng)然(ran)廣(guang)泛(fan)地(di)采(cai)用(yong)了(le)現(xian)場(chang)總(zong)線(xian)技(ji)術(shu)，而(er)工(gong)業(ye)以(yi)太(tai)網(wang)應(ying)用(yong)主(zhu)要(yao)集(ji)中(zhong)在(zai)製(zhi)造(zao)執(zhi)行(xing)層(ceng)與(yu)設(she)備(bei)層(ceng)之(zhi)間(jian)。這(zhe)樣(yang)既(ji)減(jian)少(shao)了(le)用(yong)戶(hu)的(de)投(tou)資(zi)風(feng)險(xian)，又(you)保(bao)護(hu)了(le)用(yong)戶(hu)的(de)已(yi)有(you)設(she)備(bei)和(he)技(ji)術(shu)投(tou)資(zi)。可(ke)以(yi)預(yu)計(ji)，現(xian)場(chang)總(zong)線(xian)與(yu)工(gong)業(ye)以(yi)太(tai)網(wang)混(hun)存(cun)的(de)狀(zhuang)態(tai)還(hai)會(hui)持(chi)續(xu)相(xiang)當(dang)長(chang)的(de)時(shi)間(jian)。不(bu)過(guo)，可(ke)以(yi)肯(ken)定(ding)的(de)是(shi)，以(yi)太(tai)網(wang)已(yi)經(jing)成(cheng)為(wei)工(gong)業(ye)現(xian)場(chang)不(bu)可(ke)逆(ni)轉(zhuan)的(de)“存在”。從目前國際、guoneigongyeyitaiwangjishudefazhanlaikan
，muqiangongyeyitaiwangzaizhizaozhixingcengyidedaoguangfanyingyong
，bingchengweishishishangdebiaozhun。weilaigongyeyitaiwangjiangzaigongyeqiyezonghezidonghuaxitongzhongdexianchangshebeizhijiandehulianhexinxijichengzhongfahuiyuelaiyuezhongyaodezuoyong。

　　xianchangzongxianjishuyouyunanyixingchengtongyidebiaozhun
，yinerzaihendachengduyingxiangletadetuiguangyingyong。lingwaidanyidexianchangzongxianxianranwufawanchengfuzadexinxiguanligongneng，zheshiqiyuxinxiwangluodejichengbiandeshifenziran。chuantongshangyongyitaiwangshidangjinyingyongzuiguangfandetongxinjishu，juyouzhuduoyoudian。danshi，yitaiwangbeirenweishiyizhong“非確定性”的網絡，不能滿足實時性要求，也不符合工業現場惡劣環境要求。隨著工業以太網的發展，通信確定性與實時性
、穩定性與可靠性、安全性、zongxiangongdiandengwentizaigongyeyitaiwangzhongzhengzaidedaojiejue。renmenpubianrenweigongyeyitaiwangshiweilaikongzhiwangluodezuijiajiejuefangan
，juyouguangkuodefazhanqianjing。danjiumuqianlaikan，gongyeyitaiwangyaoshiyongzhuanyongdegongyeyitaiwangjiaohuanji，tongxunmokuaidengjiagebufeideshebei，zheshidegongyeyitaiwangdetuiguangyingyongshoudaoyidingyingxiang。yinci
，xianchangzongxianyugongyeyitaiwanghuncunxianchangzongxianzuoweiyitaiwangdeziwangeryitaiwangzuoweixianchangzongxiandeshangjiwangdezhuangtaishimuqianjiaoweixianshidejiejuefangan。bingqiehuichixuxiangdangchangdeyiduanshijian。