The Erasable PROM (EPROM) is needed for storing certain parameters (such as the relaying settings) which may be changed from time to time, but once it is set it must remain fixed even if the power supply to the computer is interrupted.

• 可擦写prom(Eprom)用来存放某些参数(如继电保护整定值),这些参数可能经常变动,但一旦设置好,即使计算机电源断电,也保持不变。