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              IC660BBD024
              IC660BBD024 價格:1166  元(人民幣) 產地:美國
              最少起訂量:1 發貨地:福建廈門
              上架時間:2018-11-13 10:01:29 瀏覽量:232
              廈門光沃自動化設備有限公司  
              經營模式:經銷商 公司類型:其他有限責任公司
              所屬行業:PLC控制系統 主要客戶:全國市場
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              聯系人: (先生) 手機:18030229050
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              詳細介紹

              IC660BBD024

              IC660BBD024

              IC660BBD024

              IC660BBD024

               其控制系統采用的是Fisher-Rosemount的RS3系統構成的過程控制系統PCS(Process Control System)和由TRICONIX PLC 構成的安保系統SSS(Safety & Shutdown System),它又包括ESD (Emergency Shut Down) 和 F&G (Fire & Gas)兩部分,另外,大型壓縮機等設備都采用PLC獨立控制,并以冗余RS232/422方式與PCS系統鏈接。該系統主要有以下特點:一是規模大,GC28站的I/O點為11673點;二是控制方案及控制算法復雜,控制策略與工藝過程緊密結合,自動化程度高;三是火氣檢測系統和緊急關斷系統采用了可靠的三冗余控制系統,嚴格按照四級關斷邏輯設計,安全等級高;四是火氣系統、 緊急關斷系統、壓縮機控制系統以冗余MODBUS通訊與過程控制系統有機的結合為一體,并采用一體化的組態編程方法,在操作站上為統一的操作平臺;五是系統的供電、總線、通訊、控制器、及I/O全冗余,可靠性高。該系統于2000年底投運。

              三、系統硬件
                PCS系統由RS3系統的冗余高速數據總線及其上的各種功能節點構成,它包括:4個操作員站和1個工程師站(按用途劃分)及相應的外設,11個控制器站,每個站由通訊組件、緩沖器組件、協處理器組件、存貯器組件及4組1:1冗余控制器構成,控制器下接冗余I/O。SSS系統包括ESD系統和F&G系統兩部分,由兩套獨立的TRICONEX PLC及其上位工程師站構成,為總線、控制器三冗余,I/O四冗余結構,兩套系統分別以冗余MODBUS接口與RS3系統的PLC接口連接,同時兩套系統之間以冗余RS232進行數據交換。兩套大型的壓縮機組分別采用ABB的Freelance 2000和AB PLC 5/04 控制,通過冗余的MODBUS接口與PCS 系統連接。

              四、邏輯、算法和程序
                ESD系統完成各工藝系統間及同一工藝系統的各級之間的的關斷、隔離和動設備的停車控制,ESD關斷邏輯設計為四級,第一級為全廠關斷并泄壓,第二級為全廠關斷,第三級為工藝系統關斷,第四級為工藝系統單元或單個設備關斷;關斷信號由ESD因果邏輯CAUSE & EFFECT(C&E)產生,并觸發相應的緊急切斷閥(ESDV)、瀉壓閥(SBDV)完成工藝系統的關斷,或者觸發電機等動設備完成停車;關斷源可為現場過程信號、現場火氣信號、現場手動觸發開關、控制室手動觸發開關、操作員命令或邏輯連鎖等;在PCS中,對不同類型的關斷信號設開車旁路、維護旁路、和ESD信號禁止等邏輯;所有的關斷閥和動設備的狀態在PCS操作站上顯示。ESD邏輯(C&E)采用功能塊圖(FBD)的模式編輯,經過編譯后下載至控制器運行。


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