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        1797-INS
        
                        
        發布者：工控備件  發布時間：2019-08-14 16:39:03  訪問次數：159
        
                        
        
                                            	
                    	
                        
        
	 
	
        
    
         1797-INS現貨 in stock! 歡迎來電咨詢~��！
         1797-INS

        道交通低壓開關柜、環控電控柜系統, 由環控電控室及中間風井配電房內的400V環控Ⅰ、 Ⅱ級負荷進線雙電源切換柜及饋出柜、Ⅲ級負荷單電源進線柜及饋出柜、軟起動柜、繼電器柜(J屏)等組成.施耐德電氣自動化iMCC解決方案在上海地鐵M7環控電控 iMCC和上海地鐵 M10 環控電控iMCC中成功應用,本文主要將施耐德電氣自動化iMCC解決方案在上海地鐵的應用作一總結。
        　　網絡結構
        　　綜合單元任務是將環控室內職能裝置通過現場總線或工業以太網連接在一起。綜合單元將相關的信號上傳至上一級系統(EMCS),并將上一級系統(EMCS)的控制命令轉發給環控室內的智能裝置，以完成整個環控室的控制和集成，它主要的硬件設備平臺-環控柜綜合管理系統監控主機(PLC-B)和軟件應用平臺組成。
        　　監控主機是各職能設備與車站綜合監控(EMCS)之間的通訊樞紐，是實現綜合自動化必不可少的設備，它具有多串口，支持多網絡、多規約的要求，具有很好的可擴充性和可維護性。與各個串口上所連接的智能設備及各開關量進行通訊，同時與上一級綜合監控系統進行數據交換，實現遙測、遙信和遙控功能。
        　　繼電器(J)屏風門、風閥類設備控制中使用可編程控制器模塊PLC-A, 主要負責對事故風機組合風閥等集中控制，提供柜與綜合監控等系統接口端子。PLC-A作為PLC-B同系列的遠程IO模塊，通過冗余的雙總線方式與PLC-B連接。即采用遠程I/O通訊方式，現場執行機構、儀器儀表、配電系統等，通過遠程I/ O模塊，實現遠程控制。
        監控主機(PLC-B)
        　　綜合管理系統單元采用冗余配置,雙機熱備系統與Unity Pro 軟件相兼容，并通過Quantum CPU提供關鍵過程應用所需要的高度可用性。
        　　冗余CPU采用 140CPU67160，它采用Pentium II型芯片，主頻266MHz。 Modbus、Modbus Plus、TCP/IP、USB等多種通訊端口和內存卡插槽，內存卡最多可擴展至16M。集成液晶顯示屏幕，用于顯示系統的運行、故障、通訊等狀態信息。支持鑰匙開關和多種口令保護，保證系統可靠、穩定運行;
        　　監控主機選用了雙機熱備系統,即兩個CPU位于兩個機架上, 實現CPU、電源、通訊模塊、擴展電纜全部冗余，它們共享一套I/O�；� 100 Mbps 高速光纖鏈路，用光纖連接兩個熱備控制器工作時一臺CPU為主機，另一臺為熱備機，主備CPU直接通過光纖連接,如主機發生故障或自檢失敗時可和熱備機進行無擾切。該切換為硬件切換，非軟件切換，不需編寫額外的切換用戶程序。
        　　系統結構的中心部分是兩個Quantum PLC 機架，即通常意義下的“主機” 和“備機”。它們的硬件配置相同( 每個本地機架上安裝的模塊必須一致)。每個機架配置的核心部件是140 CPU 67160 處理器，專門設計用于Unity Pro 軟件下的雙機熱備架構。該處理器是一個雙槽模塊，同時包含中央處理單元和一個冗余協處理器。
        　　“主” PLC 執行應用程序并且控制輸入輸出(I/O)。“備” PLC駐留在后臺，必要的時候取代“主”PLC�！皞錂C”和“主機”之間通過一個集成在 CPU 當中的高速光纖鏈路(100Mbps)相連接,以確保主備CPU之間數據備份的實時性。
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        1797-INS
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