NI PXIe-6363數(shù)據(jù)采集輸入卡
品牌：NI
型號：NI PXIe-6363數(shù)據(jù)采集輸入卡
產(chǎn)品說明：數(shù)據(jù)采集輸入卡
NI PXIe-6363數(shù)據(jù)采集輸入卡中文資料：
NI PXIe-6363數(shù)據(jù)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(guī)范。超過規(guī)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(guī)范見附錄A。當超過共模電壓規(guī)范時，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，請參見附錄G。NI PXIe-6363內(nèi)存波動性術(shù)語波動性是指當斷電時，某一內(nèi)存類型是否保留或丟失其內(nèi)容（數(shù)據(jù)）的問題。?易失性內(nèi)存-當斷電時丟失其內(nèi)容的內(nèi)存。RAM內(nèi)存固有的易失性。因此，當PLC關(guān)閉時，如果要防止RAM存儲器中的數(shù)據(jù)丟失，則需要備用電池。?非易失性存儲器-斷電時保留其內(nèi)容的存儲器。各種類型的PROM（可編程只讀存儲器）內(nèi)存都是非易失性的。RAM內(nèi)存每個Series 90-30 CPU都使用RAM內(nèi)存作為“工作內(nèi)存”所使用的RAM芯片為CMOS類型。CMOS RAM是免費金屬氧化物半導體、隨機存取存儲器的縮寫。CMOS RAM是一種相對快速、低功耗的存儲器，可以很容易地檢查（讀取）和更改（寫入）。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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