描述
FC-9801F1NEC
PLC的通信及聯(lián)網(wǎng)
PLC的通信包括PLC之間、PLC與上位計算機之間以及PLC與其他智能設備間的通信。PLC系統(tǒng)與通用計算機可以直接或通過通信處理單元、通信轉接器相連構成網(wǎng)絡，以實現(xiàn)信息的交換，并可構成“集中管理、分散控制”的分布式控制系統(tǒng)，滿足工廠自動化(FA)系統(tǒng)發(fā)展的需要，各PLC系統(tǒng)或遠程I/O模塊按功能各自放置在生產(chǎn)現(xiàn)場分散控制，然后采用網(wǎng)絡連接構成集中管理的分布式網(wǎng)絡系統(tǒng)。
以西門子公司的SIMATIC NET為例，在其提出的全集成自動化(TIA)的系統(tǒng)概念中，核心內(nèi)容即包括組態(tài)和編程的集成、數(shù)據(jù)管理的集成以及通信的集成。通信網(wǎng)絡是這個系統(tǒng)重要的、關鍵的組件，提供了部件和網(wǎng)絡間完善的工業(yè)通信。SIMATIC NET包含了三個主要層次：
AS-I網(wǎng)——傳感器和執(zhí)行器通信的國際標準，掃描時間5ms，傳輸媒體為未屏蔽的雙絞線，線路長度為300m，最多為31個從站。
PROFIBUS——工業(yè)現(xiàn)場總線，用于車間級和現(xiàn)場級的國際標準，傳輸率最大12m/s，傳輸媒體為屏蔽雙線電纜(最長9.6km)或光纜(最長90km)，最多可接127個從站。
工業(yè)以太網(wǎng)——用于區(qū)域和單元聯(lián)網(wǎng)的國際標準，網(wǎng)絡規(guī)?？蛇_1024站1.5km(電氣網(wǎng)絡)或200km(光學網(wǎng)絡)。
在這一網(wǎng)絡體系中，尤其值得一提的是PROFIBUS現(xiàn)場總線，PROFIBUS是目前最成功的現(xiàn)場總線之一，已得到廣泛地應用。它是不依賴生產(chǎn)廠家的、開放式的現(xiàn)場總線，各種各樣的自動化設備均可通過同樣的接口交換信息。為數(shù)眾多的生產(chǎn)廠家提供了優(yōu)質的PROFIBUS產(chǎn)品，用戶可以自由地選擇最合適的產(chǎn)品。PROFIBUS已經(jīng)成為德國國家標準DIN19245和歐洲標準pr EN50170，并在世界擁有了最多的用戶數(shù)量。
產(chǎn)品承諾：
保?證?全新原裝進口,
保?證?安全準時發(fā)貨，
保?證售后服務質量，
優(yōu)勢價格，大量現(xiàn)貨。
主營DCS系統(tǒng)配件
機器人系統(tǒng)配件
大型伺服系統(tǒng)配件
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專業(yè)銷售進口DCS? PLC系統(tǒng)備件模塊
PLC模塊，可編程控制器，CPU模塊，IO模塊，AI模塊，通訊模塊。AB/施耐德/ABB/GE/本特利/西屋/英維斯/霍尼韋爾/黑馬/FU克斯波羅
15天包退換 一年質保 大量現(xiàn)貨? 國內(nèi)實力庫存商家
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