WOODWARD 5466-332 I/o模塊
1.產(chǎn) 品 介 紹
品牌：WOODWARD
型號說明：WOODWARD 5466-332 I/o模塊
優(yōu)勢：供應(yīng)進(jìn)口原裝正品，專業(yè)停產(chǎn)配件。
公司主營特點(diǎn)：主營產(chǎn)品各種模塊/卡件，控制器，觸摸屏，伺服驅(qū)動器。
2.產(chǎn) 品 詳 情 資 料：
WOODWARD 5466-332 I/O單元通過光模塊總線和每個S800 I/O集群上的兩個TB840集群調(diào)制解調(diào)器連接到兩個CPU（參見第161頁的圖55）。TP830基板上的內(nèi)置電氣模塊總線不能用于連接冗余系統(tǒng)中的S800 I/O。PM891中的冗余鏈路由兩個物理鏈路組成。這是RCU數(shù)據(jù)鏈路和RCU控制鏈路。RCU數(shù)據(jù)鏈路是一個快速通信信道，用于傳輸保持備份CPU與主CPU同步所需的數(shù)據(jù)。WOODWARD 5466-332數(shù)據(jù)鏈路電纜用于數(shù)據(jù)鏈路。RCU控制鏈路用于角色選擇和CPU標(biāo)識分配（UPPER/LOWER）。WOODWARD 5466-332控制鏈路電纜用于控制鏈路。容錯原則冗余處理器單元的容錯原則是基于備份單元不斷更新到與主單元相同的狀態(tài)。這使得備份單元能夠在不影響周圍系統(tǒng)的情況下進(jìn)行控制。該原理涉及將程序執(zhí)行動態(tài)劃分為執(zhí)行單元，并創(chuàng)建回滾點(diǎn)，在回滾點(diǎn)處處理器單元的狀態(tài)被完全定義。
S800 I/O units are connected to the two CPUs via the optical ModuleBus and two TB840 cluster modems on each S800 I/O clusterWOODWARD 5466-332 The built-in electrical ModuleBus on the TP830 baseplate cannot be used for connecting S800 I/O in a redundant system.The Redundancy Link in PM891 consists of two physical links. These are the RCU Data Link and the RCU Control Link. The RCU Data Link is a fast communication channel used to transfer the data required to keep the backup CPU synchronized with the primary CPU.WOODWARD 5466-332 Data Link Cable is used for the data link. The RCU Control Link is used for role selection and CPU identity assignment (UPPER/LOWER). TK856 RCU Control Link Cable is used for the control link. Fault Tolerance Principle The principle of fault tolerance in the redundant processor units is based on continuous updating of the backup unit to the same status as the primary unit. This enables the backup unit to assume control without affecting surrounding systems in a bumpless manner. This principle involves dynamic division of the program execution into execution units and the creation of rollback points at which the processor unit's status is completely defined.WOODWARD 5466-332
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