NI PXIe-6672定时和同步模块
品牌：NI
型号：NI PXIe-6672
产品说明：定时和同步模块
NI PXIe-6672定时和同步模块中文资料：
NI PXIe-6672定时和同步模块EEPROM：电可擦除可编程只读存储器。它是一种插入式集成电路存储设备，安装在PLC中时可以擦除和写入。闪存：EEPROM型存储器的变体。它也是一种集成电路设备，安装在PLC中时可以擦除和写入。具有固件闪存存储的CPU的一个优点是，可以通过从个人计算机通过PLC串行端口向闪存写入来更新固件。NI PXIe-6672闪存固件升级无需移除任何模块。在90-30 CPU中使用PROM设备PROM型设备有两种方式用于90-30 CPU：存储CPU固件Ŷ存储用户数据，包括程序、配置和寄存器数据。下表显示了每个CPU使用的PROM设备类型。早期版本的CPU341仅支持可选EPROM和可选EEPROM。从硬件版本IC693CPU341-J和固件版本4.61开始，仅支持可选闪存。NI PXIe-6672
英文资料
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: Ŷ To store CPU firmware Ŷ 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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