
B–63465EN/01
E. DATA BACKUPAPPENDIX
139
Data items are backed up one by one using the Handy File. For the
operation method, see Chapter 3.
SRAM data can be copied into the built–in FROM of the Digital Servo
Adapter without using a memory card or floppy disk. For the operation
method, see “SETTING/MAINTENANCE USING THE Digital Servo
Adapter MAIN UNIT” in Appendix F.4.
This method allows SRAM data to be easily restored if the data is
accidentally damaged during printed–circuit board replacement that does
not involve fuse replacement or memory module mounting/dismounting.
Also when printed–circuit board replacement involving memory module
mounting/dismounting is performed (that is, SRAM data is certainly
lost), SRAM data can easily be restored if its backup copy is created using
this method in advance.
CAUTION
1 This method does not mean that backup to a memory card
or floppy disk becomes unnecessary. Just with a backup
copy in the built–in FROM, data may not be able to be
retrieved if the Digital Servo Adapter memory bus becomes
defective.
2 Data in the FROM can be rewritten a limited number of
times. This function is designed for data backup performed
at maintenance (about several hundreds times), and is not
assumed to be used for data rewritten periodically or
constantly.
E.4
DATA BACKUP ONTO
A FLOPPY DISK
USING THE Handy
File
E.5
COPYING SRAM
DATA INTO THE
BUILT–IN FROM OF
THE Digital Servo
Adapter