任何一個(gè)自診斷位為ON,則報(bào)警結(jié)點(diǎn)閉合。所有自診斷位OFF,則報(bào)警結(jié)點(diǎn)打開(kāi)。系統(tǒng)上電時(shí)，系統(tǒng)中許多模塊進(jìn)行上電自檢。CPU模塊執(zhí)行硬件檢測(cè)和軟件確認(rèn)檢測(cè)。智能模塊進(jìn)行安裝和確認(rèn)板子上的微處理器，軟件檢查確認(rèn)，本地硬件確認(rèn)并且通知CPU自檢完成。任何自檢失敗都會(huì)在系統(tǒng)配置周期的某–時(shí)刻以隊(duì)列形勢(shì)報(bào)告給CPU.

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