NI PXIe-6363數據采集輸入卡
品牌：NI
型號：NI PXIe-6363數據采集輸入卡
產(chǎn)品說(shuō)明：數據采集輸入卡
NI PXIe-6363數據采集輸入卡中文資料：
NI PXIe-6363數據采集輸入卡必須注意，與此串行端口的連接符合共模電壓規范。超過(guò)規定值的共模條件將導致傳輸錯誤和/或90系列PLC組件損壞。共模規范見(jiàn)附錄A。當超過(guò)共模電壓規范時(shí)，必須使用端口隔離器，如GE Fanuc IC690ACC903。有關(guān)此端口隔離器的詳細信息，請參見(jiàn)附錄G。NI PXIe-6363內存波動(dòng)性術(shù)語(yǔ)波動(dòng)性是指當斷電時(shí)，某一內存類(lèi)型是否保留或丟失其內容（數據）的問(wèn)題。?易失性?xún)却?當斷電時(shí)丟失其內容的內存。RAM內存固有的易失性。因此，當PLC關(guān)閉時(shí)，如果要防止RAM存儲器中的數據丟失，則需要備用電池。?非易失性存儲器-斷電時(shí)保留其內容的存儲器。各種類(lèi)型的PROM（可編程只讀存儲器）內存都是非易失性的。RAM內存每個(gè)Series 90-30 CPU都使用RAM內存作為“工作內存”所使用的RAM芯片為CMOS類(lèi)型。CMOS RAM是免費金屬氧化物半導體、隨機存取存儲器的縮寫(xiě)。CMOS RAM是一種相對快速、低功耗的存儲器，可以很容易地檢查（讀?。┖透模▽?xiě)入）。NI PXIe-6363
英文資料
Care must be taken that common mode voltage specifications are met for connections to this serial port. Common mode conditions that exceed those specified will result in errors in transmission and/or damage to Series 90 PLC components. Common mode specifications are discussed in Appendix A. When the common mode voltage specification is exceeded, a port isolator such as the GE Fanuc IC690ACC903 must be used. See Appendix G for details on this port isolator. Memory Volatility The term volatility refers to the issue of whether or not a certain memory type retains or loses its contents (data) when power is removed from it. ? Volatile memory - memory that loses its contents when power is removed. RAM memory is inherently volatile. Therefore, when the PLC is turned off, a backup battery is necessary if data loss in RAM memory is to be prevented. ? Non-volatile memory - memory that retains its contents when power is removed. The various types of PROM (Programmable Read-Only Memory) memory are non-volatile.RAM Memory Every Series 90-30 CPU uses RAM memory for its ”working memory.” The RAM chips used are of the CMOS type. CMOS RAM is an acronym for Complimentary Metal-Oxide Semiconductor, Random Access Memory. CMOS RAM is a relatively fast, low power memory that can be easily examined (read) and changed (written to).
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