SIEMENS 6ES7952-1AK00-0AA0
SIEMENS 6ES7952-1AK00-0AA0
SIEMENS 6ES7952-1AK00-0AA0
SIEMENS 6ES7952-1AK00-0AA0
為提高數據通信的整體可靠性和容錯性，本DCS控制系統也采用環形的網絡拓補結構。但是由于環形網本身固有的缺點是節點故障引起全網故障，因此數據通信鏈路的冗余技術應運而生。為了保證2層網絡的順利工作，2個網絡都采用1∶1的冗余設置。分布處理單元檢測到主網出現故障時，自動放棄從主網的端口通信，同時啟用冗余網的端口，將數據轉由冗余網發送 和接受。此時冗余網進入數據通信狀態，主網及時進行修補。雙環網技術實現了傳輸媒介的冗余，在TurboRing的基礎上進一步提高了系統的可靠性。但雙環網的管理和切換都比較復雜，本系統采用了一種簡單的方法。
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