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CHAPTER 3 FUNCTIONS
3
3.31 CPU Module Change Function with Memory Card
3.31.1 Data backup for the CPU module change function
(3) Data backup operation details
(a) Changing a memory card or SD memory card
If a memory card or SD memory card is being used in a running system, the card can be changed to another
card after the status of the data backup function shifts into the ready status. (SM609 (Memory card
remove/insert enable flag) does not need to be turned on.) Upon the status change, the CPU module turns off
SM604 (Memory card in-use flag).
(b) Data backup operation status
The following table lists the backup operation status.
Status Description Value in SD690
Before backup start Data backup processing has not been started.
0
H
Backup start prepared
A memory card or SD memory card can be changed (removed
and inserted).
1
H
Backup start preparation completed Backup target data are set.
2
H
Backup in execution Data are being backed up.
3
H
Backup completed Data have been backed up normally
4
H
Backup error Data backup has failed and an error has occurred.
FF
H
Start
Before backup start
Backup start prepared
Backup is ready to start.
Backup start preparation
completed
Backup in execution
Data have been backed up to
a memory card or SD memory card.
Backup completed
End
Data backup has failed.
Backup error
Data are backed up again.
Backup start setup request
from the programming tool
The backup start setup
contact is turned on.
Backup start request
from the programming tool
The backup start
contact is turned on.
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