NI PXIe-6672定時(shí)和同步模塊
品牌：NI
型號：NI PXIe-6672
產(chǎn)品說(shuō)明：定時(shí)和同步模塊
NI PXIe-6672定時(shí)和同步模塊中文資料：
NI PXIe-6672定時(shí)和同步模塊EEPROM：電可擦除可編程只讀存儲器。它是一種插入式集成電路存儲設備，安裝在PLC中時(shí)可以擦除和寫(xiě)入。閃存：EEPROM型存儲器的變體。它也是一種集成電路設備，安裝在PLC中時(shí)可以擦除和寫(xiě)入。具有固件閃存存儲的CPU的一個(gè)優(yōu)點(diǎn)是，可以通過(guò)從個(gè)人計算機通過(guò)PLC串行端口向閃存寫(xiě)入來(lái)更新固件。NI PXIe-6672閃存固件升級無(wú)需移除任何模塊。在90-30 CPU中使用PROM設備PROM型設備有兩種方式用于90-30 CPU：存儲CPU固件?存儲用戶(hù)數據，包括程序、配置和寄存器數據。下表顯示了每個(gè)CPU使用的PROM設備類(lèi)型。早期版本的CPU341僅支持可選EPROM和可選EEPROM。從硬件版本IC693CPU341-J和固件版本4.61開(kāi)始，僅支持可選閃存。NI PXIe-6672
英文資料
EEPROM: Electrically Erasable Programmable Read-Only Memory. It is a plug-in integrated circuit memory device that can be erased and written to while installed in the PLC. Flash Memory: A variation of the EEPROM type memory. It also is an integrated circuit device that can be erased and written to while installed in the PLC. One advantage of CPUs having flash memory storage of firmware, is that firmware can be updated by writing from a Personal Computer through a PLC serial port to flash memory. No modules have to be removed for flash firmware upgrade. Uses of PROM devices in the 90-30 CPUs PROM-type devices are used in two ways in the 90-30 CPUs: ? To store CPU firmware ? To store user data, which consists of program, configuration, and register data. The following table shows the types of PROM devices each CPU uses.Early versions of the CPU341 support optional EPROM and optional EEPROM only. Starting with hardware version IC693CPU341-J and Firmware version 4.61, only optional Flash is supported.NI PXIe-6672
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