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(2) Operation for restoring backup data
Figure 6.122 shows operation for restoration.
A value indicating restoration status is stored in SD693 (Restoration status).
(3) Operation of special relay and special register
*1
Figure 6.123 shows the operation of SM692 (Restoration complete flag) at restoration.
*1: For details of special relays and special registers for restoration, refer to CHAPTER 12.
Restoration from GX Developer
Automatic restoration
Figure 6.122 Operation for restoration
Table6.57 Status at restoration
Status Description Value stored in SD693
Before restoration start Restoration is not performed. 0
H
Restoration in execution Restoration is in execution. 1H
Restoration completed Restoration is normally completed. 2H
Restoration error Restoration failed due to an error. FFH
Figure 6.123 Operation of the special relay
Start
End
Restoration is
performed again.
1: Before restoration start
Mount a memory card storing the
backup data to the CPU module and
restore the data with GX Developer.
Restoration failed.
4: Restoration error
Restoration is suspended.
2: Restoration in execution
Restoration is completed.
3: Restoration completed
After restoration, power off and then on the
CPU module or reset the CPU module.
Start
End
Restoration is
performed again.
Restoration failed.
4: Restoration error
1: Before restoration start
Mount a memory card storing the backup data
to the CPU module and power off and then on
the CPU module or reset the CPU module.
2: Restoration in execution
Restoration is completed.
3: Restoration completed
After restoration, the CPU module can continue operation.
Powering off and then on the CPU module or
resetting the CPU module is unnecessary.
Off
On
SM692
(Restoration
complete flag)
Before
restoration start
Restoration in
execution
Restoration
completed