WOODWARD 5464-843 Cpu處理器模塊
1.產(chǎn) 品 介 紹
品牌：WOODWARD
型號(hào)說明：WOODWARD 5464-843 Cpu處理器模塊
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2.產(chǎn) 品 詳 情 資 料：
WOODWARD 5464-843在重新執(zhí)行期間，使用已經(jīng)執(zhí)行的外圍單元引用的結(jié)果，而不是重新執(zhí)行它們。讀取操作的結(jié)果將從日志中檢索，而寫入操作將在不執(zhí)行的情況下傳遞，因?yàn)樗鼈円呀?jīng)執(zhí)行。因此，除了發(fā)生的時(shí)間延遲外，外圍設(shè)備的狀態(tài)不會(huì)以任何方式受到重新執(zhí)行的影響。處理器單元中包含的RAM提供自動(dòng)雙反轉(zhuǎn)存儲(chǔ)器功能，WOODWARD 5464-843用于檢測(cè)存儲(chǔ)器中的任意位錯(cuò)誤。?所有內(nèi)存更新都并行寫入主內(nèi)存和反向內(nèi)存。?在每個(gè)內(nèi)存讀取周期，比較兩個(gè)內(nèi)存的數(shù)據(jù)。?如果數(shù)據(jù)不匹配，則強(qiáng)制轉(zhuǎn)換。雙反轉(zhuǎn)內(nèi)存處理是在硬件中完成的，不會(huì)對(duì)內(nèi)存周期時(shí)間造成任何延遲。冗余配置中的MAC和IP地址處理為了提供與控制網(wǎng)絡(luò)相關(guān)的無擾切換，MAC地址和IP地址在初始主CPU和備用CPU之間交換。初始主CPU的地址被存儲(chǔ)并保持為代理主CPU使用的地址WOODWARD 5464-843
During re-execution, the results of the peripheral units' references, which have already been executed, are used, rather than re-executing them. The results of read operations are retrieved from the log, and write operations pass without execution,WOODWARD 5464-843 since they have already been executed. The peripheral units' statuses, then, are not affected by the reexecution in any way, except for the time delay which occurs. The RAM included in the processor unit provides an automatic double inverted memory function for detection of arbitrary bit errors in the memory. ? All memory updates are written to both the primary memory and to the inverted memory in parallel. ? At every memory read cycle, the data from tho two memories is compared. ? If there is a mismatch in the data a changeover is forced. The double inverted memory handling is done in hardware and without any delay to the memory cycle time.MAC and IP Address Handling in Redundant Configuration In order to provide for a bumpless changeover with respect to the control network, both the MAC and IP addresses are swapped between the initial primary and backup CPUs. The addresses of the initial primary CPU are stored and kept as the addresses used by the acting primary CPUWOODWARD 5464-843
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