Mitsubishi Electric MELSEC-Q00U(J)CPU User Manual page 274

(3) Restoration behavior of data backed up
The following figures show the restoration behavior of data backed up.
• Restoration using a programming tool
Restoration is
performed again.
Data restoration has failed.
4: Restoration error
Restoration is suspended.
A value indicating restoration status is stored in SD693 (Restoration status).
Status
Before restoration start
Restoration in execution
Restoration completed
Restoration error
(4) Operation of the special relay and special register
The following figure shows the operation of SM692 (Restoration complete flag).
(Restoration
complete flag)
*1 For details of the special relay and special register used for this function, refer to the following.
QCPU User's Manual (Hardware Design, Maintenance and Inspection)
272
Start
1: Before restoration start
Insert a memory card or SD memory
card storing the backup data to the
CPU module, and restore the data
using a programming tool.
2: Restoration in execution
Data have been restored
successfully.
3: Restoration completed
End
After the restoration processing ends,
power off and then on or reset the
CPU module.
Restoration processing has not been started.
Data are being restored.
Data have restored normally.
Data restoration has failed and an error has occurred.
Before
restoration start
SM692
On
Off
• Automatic restoration
Restoration is
performed again.
Data restoration has failed.
4: Restoration error
Description
*1
Restoration in
execution
Start
1: Before restoration start
Insert a memory card or SD memory
card storing the backup data to the
CPU module, and power off and
then on or reset the CPU module.
2: Restoration in execution
Data have been restored
successfully.
3: Restoration completed
End
After the restoration processing ends
the CPU module continues its operatio
Powering off and then on or resetting
the CPU module is not required.
Value stored in SD693
0
H
1
H
2
H
FF
H
Restoration
completed