6ES7331-7PF01-0AB0 8路模擬量輸入

6ES7331-7PF01-0AB0

為什么在某些情況下，保留區(qū)會(huì)被重寫

在 STEP7 的硬件組態(tài)中，可以把幾個(gè)操作數(shù)區(qū)定義為“保留區(qū)”。這樣可以在掉電以后，即使沒有備份電池的話，仍能保持這些區(qū)域中的內(nèi)容。如果定義一個(gè)

塊為“保留塊”，而它在 CPU 中不存在或只是臨時(shí)安裝過，那么這些區(qū)域的部分內(nèi)容會(huì)被重寫。在電源接通/斷開之后，其他內(nèi)容會(huì)在相關(guān)區(qū)里找到。

為何不能把閃存卡的內(nèi)容加載入 S7300CPU

你的項(xiàng)目在閃存卡上?，F(xiàn)在要用它加載 S7300。但加載結(jié)束后發(fā)現(xiàn) CPU 的 RAM 中仍是空的。出現(xiàn)此問題的原因是你的程序里有無法處理的，"錯(cuò)誤的"組織塊（比

如說，OB86 沒有 DP 接口）。在重新設(shè)置和重新啟動(dòng) CPU 后,RAM 仍是空的。診斷緩沖區(qū)對(duì)這個(gè)"無法加載"的塊會(huì)提示一些信息。

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