D. MEMORY CARD OPERATOR’S
(1)The SRAM memory card needs the battery for data backup, but does
not include the battery when you get it.
Please insert the battery, according to “D.6 Change Battery”.
(2)The SRAM memory card, data of memory card will be lost when the
battery life is over, and please copy data of the memory card into a
(3)The SRAM memory card has a battery voltage detecting function. And
when the SRAM memory card which has low voltage battery is
connected to CNC unit, the alarm message is displayed on CNC unit.
But the battery voltage detecting function cannot operate without a
The SRAM memory card cannot be used to back up data.
A memory card is capacity normally refers to the unformatted capacity.
When a memory card is formatted, the amount of space on the card that
can actually be used decreases slightly. Therefore, a memory card must
have a capacity larger than the size of the data or programs to be stored
on that card.
Example:When 512KB data is stored
A memory card with a capacity of at least 1MB is required.
Flash memory cards use their last 128KB area as a buffer area for the
memory cards themselves. Therefore, the usable space is further
decreased by 128KB.
In the boot system, a memory card is formatted using the FAT file system.
There is another formatting method, called the flash file system. The FAT
file system and flash file system are not compatible with each other. Even
the read and list functions cannot be used between these systems.
Flash memory cards do not allow individual files to be erased. All the
files on a memory card must be erased at the same time. Therefore, the
following operations can not be used:
D Deleting an existing file
D Renaming a file
D Overwriting a file with another file having the same name
ADVICE FOR USE
SRAM Memory Card
Memory Card Capacity
File Operation with a
Flash Memory Card