NI PXIe-6363數(shù)據(jù)采集輸入卡
品牌：NI
型號(hào)：NI PXIe-6363數(shù)據(jù)采集輸入卡
產(chǎn)品說(shuō)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(guò)規(guī)定值的共模條件將導(dǎo)致傳輸錯(cuò)誤和/或90系列PLC組件損壞。共模規(guī)范見(jiàn)附錄A。當(dāng)超過(guò)共模電壓規(guī)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(xì)信息，請(qǐng)參見(jiàn)附錄G。NI PXIe-6363內(nèi)存波動(dòng)性術(shù)語(yǔ)波動(dòng)性是指當(dāng)斷電時(shí)，某一內(nèi)存類(lèi)型是否保留或丟失其內(nèi)容（數(shù)據(jù)）的問(wèn)題。?易失性內(nèi)存-當(dāng)斷電時(shí)丟失其內(nèi)容的內(nèi)存。RAM內(nèi)存固有的易失性。因此，當(dāng)PLC關(guān)閉時(shí)，如果要防止RAM存儲(chǔ)器中的數(shù)據(jù)丟失，則需要備用電池。?非易失性存儲(chǔ)器-斷電時(shí)保留其內(nèi)容的存儲(chǔ)器。各種類(lèi)型的PROM（可編程只讀存儲(chǔ)器）內(nèi)存都是非易失性的。RAM內(nèi)存每個(gè)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(lèi)型。CMOS RAM是免費(fèi)金屬氧化物半導(dǎo)體、隨機(jī)存取存儲(chǔ)器的縮寫(xiě)。CMOS RAM是一種相對(duì)快速、低功耗的存儲(chǔ)器，可以很容易地檢查（讀取）和更改（寫(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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