設(shè)備網(wǎng)網(wǎng)絡(luò)通過一個(gè)開放的網(wǎng)絡(luò),將底層的設(shè)備直接和車間級控制器相連,而無需通過硬線將它們與I/O模塊連接,世界范圍的150多個(gè)銷售商積極支持敞開式設(shè)備網(wǎng)銷售者協(xié)會(ODVA)基于CAN技術(shù)的網(wǎng)絡(luò)。
設(shè)備網(wǎng)網(wǎng)絡(luò)通過一個(gè)開放的網(wǎng)絡(luò),將底層的設(shè)備直接和車間級控制器相連,而無需通過硬線將它們與I/O模塊連接,世界范圍的150多個(gè)銷售商積極支持敞開式設(shè)備網(wǎng)銷售者協(xié)會(ODVA)基于CAN技術(shù)的網(wǎng)絡(luò)。
這種64個(gè)節(jié)點(diǎn),多支線的網(wǎng)絡(luò),允許用戶用一根電纜去連接500m(1641ft)以內(nèi)的設(shè)備并遠(yuǎn)至用戶的可編程控制器,無需用導(dǎo)線把每個(gè)設(shè)備和一個(gè)I/O機(jī)架連接起來,總之所有這一切可以減少導(dǎo)線的費(fèi)用并方便安裝。
如今,“智能”設(shè)備可以提供診斷,包括預(yù)測故障,這可以使系統(tǒng)停機(jī)時(shí)間減少。
設(shè)備網(wǎng)網(wǎng)絡(luò)是基于生產(chǎn)者/客戶模式(Producer/Customer)網(wǎng)絡(luò)模式,這是最現(xiàn)代化的網(wǎng)絡(luò)技術(shù),生產(chǎn)者/客戶模式使控制數(shù)據(jù)同時(shí)到達(dá)操作的每一個(gè)單元,可以更有效地利用網(wǎng)絡(luò)的頻帶寬度。
生產(chǎn)者/客戶模式同時(shí)可以顯著地減少網(wǎng)絡(luò)通信量,因?yàn)樗试S狀態(tài)切換的報(bào)文發(fā)送,以作出更快的響應(yīng),同時(shí),周期性的報(bào)文發(fā)送,以提供更好的確定性。對等通信允許數(shù)據(jù)和狀態(tài)信息在設(shè)備間進(jìn)行交換,這些優(yōu)點(diǎn)如更快地響應(yīng),更好的確定性,增強(qiáng)的靈活性/最優(yōu)化,所有這些可產(chǎn)生更高的生產(chǎn)率。
將設(shè)備網(wǎng)(Device Net)特性與羅克韋爾自動化新技術(shù)結(jié)合起來:
設(shè)備網(wǎng)網(wǎng)絡(luò)為底層設(shè)備網(wǎng)提供了有效的投資途徑,并可進(jìn)入到那些設(shè)備的智能部分。羅克韋爾自動化基于最新的技術(shù),繼續(xù)給用戶帶來新技術(shù)途徑,相應(yīng)地,我們帶給用戶的設(shè)備網(wǎng)產(chǎn)品使用戶具有如下能力:
·在9000系列光電傳感器失效之前,就知道它正在變模糊(也許是因?yàn)樵诶忡R上有灰塵積累)。
·共享多個(gè)適配器掃描(Adapta Scan)條形碼閱讀器的查詢表和I/O狀態(tài)。
·用SMP-3 固態(tài)過載繼電器監(jiān)視電動機(jī)當(dāng)前的電流,相間平衡以及熱容量。
·用EZLINK 軸承監(jiān)視器, 記錄軸承溫度和轉(zhuǎn)速的歷史趨勢。
·利用Device Port 或Device Box分接器減少設(shè)備網(wǎng)主干線上物理分接器的數(shù)目,降低安裝成本。
·用防護(hù)型塊形I/O組件省掉額外封裝,同時(shí)節(jié)省安裝時(shí)間。
·用FLEX I/O系統(tǒng)和單個(gè)的1749-ADN適配器,連接多達(dá)128個(gè)I/O點(diǎn)。
羅克韋爾設(shè)計(jì)了包含信息網(wǎng)、控制網(wǎng)和設(shè)備網(wǎng)的自動化網(wǎng)絡(luò)結(jié)構(gòu),設(shè)備網(wǎng)網(wǎng)絡(luò)可輕易地融入這一網(wǎng)絡(luò)結(jié)構(gòu),從而使羅克韋爾自動化設(shè)備網(wǎng)產(chǎn)品進(jìn)入現(xiàn)有控制系統(tǒng)變得更為簡單。
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