Checking Restoration Errors; Precautions - Mitsubishi Electric MELSEC iQ-R Series User Manual

Checking restoration errors

When an error occurs at the automatic restoration using SD955, a diagnostic error is detected. The error code is also stored
in SD959. ( Page 552 List of Error Codes)

Precautions

The following describes the precautions for the restoration function.
Prohibited operation during execution of the restoration processing
Do not perform the following operations during execution of the restoration processing.
• Removing and inserting the SD memory card
• Powering off or resetting the CPU module
The above mentioned operations leave the data in the CPU module in an incomplete state which is middle of the restoration
processing. Do not run the CPU module with this incomplete state. Doing so may cause an unintended operation. Restore the
data again or format each drive in the CPU module, and clear devices/labels before writing programs or parameters to the
programmable controller.
Suspending the restoration processing
The following operation can suspend a restoration processing.
• Setting the SD memory card forced disable
Suspension during a restoration leaves the data in the CPU module in an incomplete state which is middle of the restoration
processing. Do not run the CPU module with this incomplete state. Doing so may cause an unintended operation. Restore the
data again or format each drive in the CPU module, and clear devices/labels before writing programs or parameters to the
programmable controller.
Model name of the CPU module to which data is restored
Restore the data to the CPU module whose model name is the same as that of the CPU module where the backup data has
been stored. If not, the data cannot be restored.
Automatic restoration using SD955 and functions that cannot be executed
Do not set both of the automatic restoration using SD955 and the boot operation at a time.
If the CPU module is powered off and on or is reset with both of the automatic restoration using SD955 and the boot operation
set, the automatic restoration using SD955 does not function.
Status of the restoration destination CPU module
If the status of the restoration destination CPU module differs from that of the CPU module at the backup processing (such as
programs or parameters), the restoration may not be executed.
When the backup data to be restored is backed up in a different status from that of the restoration destination CPU module,
store 0 (All the target data) to SD954 (Restoration target data setting) and execute the automatic restoration.
When the same name folder or file exists in the restoration target CPU module
If the name of a folder or file in the restoration target CPU module and the name of a folder or file in backup data are identical,
the folder or file in the module will be overwritten by that in the backup data.
Changing the operating status during execution of restoration
During execution of the restoration processing, the CPU module remains in the STOP state even though the RUN/STOP/
RESET switch is changed from the STOP to RUN position or the remote RUN or the remote PAUSE is executed. If the
operating status of the CPU module is changed, the status will changes to the set status after the restoration processing is
completed.
22 CPU MODULE DATA BACKUP/RESTORATION FUNCTION
330
22.2 Restoration Function