6SE7090-OXX84-OABO產(chǎn)品介紹:
6SE7090-OXX84-OABO
PROFIBUS-DP中的DP即Decentralized Periphery,它具有高速低成本,用于設備級控制系統(tǒng)與分散式I/O的通信。它與PROFIBUS-PA(Process Automation )、PROFIBUS-FMS (Fieldbus Message Specification )共同組成了PROFIBUS標準,適用于系統(tǒng)和外部設備之間的通信。Profibus-DP現(xiàn)場總線系統(tǒng)可使許多現(xiàn)場設備(如PLC、智能變送器、變頻器)在同一總線進行雙向多信息數(shù)字通訊,因此可方便地使用不同廠家生產(chǎn)的控制測量系統(tǒng)相互連接成通訊網(wǎng)絡。本文以垃圾滲濾液處理系統(tǒng)為列,就生化系統(tǒng)采用西門子S7-300 PLC和ABB公司的ACS800變頻器實現(xiàn)網(wǎng)絡通訊,通過網(wǎng)絡通訊技術(shù)完成曝氣池羅茨風機傳動設備的控制。
該系統(tǒng)以西門子SIMATIC S7 CPU315-2DP作為主站,ABB變頻器ACS800為從站,實現(xiàn)全數(shù)字交流調(diào)速系統(tǒng)在Profibus-DP網(wǎng)中的通訊及控制。系統(tǒng)Profibus-DP網(wǎng)絡配置圖如圖1所示。
圖 1系統(tǒng)Profibus-DP網(wǎng)絡配置圖
編程軟件為STEP7 V5.5軟件,用于對S7-300 PLC編程和對Profibus-DP網(wǎng)進行組態(tài)和通訊配置,上位機監(jiān)控計算機與PLC間采用Profibus-DP的通訊方式。
RPBA-01為與變頻器配套的通訊適配器,插在ABB變頻器的插槽1內(nèi),其中S1為總線終端器選擇開關(guān),總線終端器可以防止總線電纜端的信號反射,如果模塊是網(wǎng)絡中最后一個模塊或是第一個模塊,總線終端器必須設置為ON ,若使用PROFIBUS 帶內(nèi)置終端器的D-sub 連接器時,必須斷開 RPBA-01終端器;S2為DP地址十位,S3為DP地址個位,如地址為26,則S2撥到2,S3撥到6,在操作時,可以改變節(jié)點的地址,但是模塊必須重新初始化才能使改變生效。
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