廈門仲鑫航自動化設備有限公司
廈門仲鑫航自動化設備有限公司
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產(chǎn)品型號6ES7422-1BL00-0AA0
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廠商性質(zhì)經(jīng)銷商
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聯(lián)系方式：張芳查看聯(lián)系方式
更新時間：2018-05-14 09:00:00瀏覽次數(shù)：749次
聯(lián)系我時，請告知來自 儀表網(wǎng)SIEMENS 6ES7422-1BL00-0AA0
SIEMENS 6ES7422-1BL00-0AA0
SIEMENS 6ES7422-1BL00-0AA0
SIEMENS 6ES7422-1BL00-0AA0
冗余分布處理單元的工作原理：兩個分布處理單元硬件配置*相同，內(nèi)部裝有相同的操作系統(tǒng)，相同的組態(tài)軟件， 相同的組態(tài)信息。在同一時刻只有1個分布處理單元通過雙機交換卡接受過程信息并進行運算處理，zui后產(chǎn)生控制結(jié)構(gòu)去控制過程設備，此分布處理單元稱為主分布處理單元。同時冗余分布處理單元并沒有閑置，它在每一個工作周期都通過雙機之間的光纖對主分布處理單元所接受的過程信息和運算結(jié)果進行實時拷貝，這樣冗余分布處理單元始終與主分布處理單元同步。冗余分布處理單元同時檢測拷貝的信息是否完整，是否在所允許的容錯度內(nèi)。一旦信息不完整或報錯，則說明主分布處理單元工作不正常。在這種情況下，冗余分布處理單元通過光纖將主分布處理單元旁路，同時切換為主分布處理單元繼續(xù)工作。切換時間選用zui短的運算周期（幾十ms或更短），從而實現(xiàn)無擾動切換。等到主分布處理單元恢復正常后，冗余分布處理單元自動把控制權(quán)交還給主分布處理單元，轉(zhuǎn)為冗余備份狀態(tài)。
廈門仲鑫航自動化設備有限公司
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