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NI PXI-7952R隨著工業(yè)技術(shù)的指數(shù)級增長
系統(tǒng)安全
PAC系統(tǒng)支持以下兩種系統(tǒng)安全類型:
密碼/授權(quán)級別
■OEM保護(hù)
密碼和授權(quán)級別
密碼是PAC系統(tǒng)CPU的一個可配置的特性。可以選擇是否使用密碼。在編程軟件中進(jìn)行密碼設(shè)置。編程器在線時，密碼為編程器的訪問設(shè)定了級別。下線模式下， 密碼失效。
缺省狀態(tài)是沒有密碼保護(hù)。CPU的每個權(quán)力等級可以有一個密碼。密碼長度為1~7ASCII個字符。只能使用編程軟件更改密碼。
設(shè)定密碼之后，通過任何通訊形式訪問CPU都要正確的輸入相應(yīng)權(quán)力級別的密碼。密碼通過校驗后，訪問可以進(jìn)行本個級別和更低級別的訪問(例如，正確輸入了第3級密碼以后，可以訪問1, 2，3級的功能)
注意:CPU的運行模式轉(zhuǎn)換會覆蓋密碼。即使在編程器上不能進(jìn)行運行/停止模式的轉(zhuǎn)換，也可以通過CPU上的轉(zhuǎn)換開關(guān)進(jìn)行轉(zhuǎn)換。
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