Precautions - Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual

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.
When labels accessible from external devices have been set in the CPU module
For the CPU module with firmware version "24" or earlier, the restoration cannot be executed if labels accessible from
external devices have been set in the CPU module by access label settings from external devices.
Check that no such labels have been set in the CPU module and then execute the restoration processing.
For the CPU module with firmware version "25" or later, the restoration by turning on SM1354 cannot be executed if labels
accessible from external devices have been set in the CPU module or in a backed up data from external devices. When the
restoration is required, execute the automatic restoration using SD955.
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 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.
15 CPU MODULE DATA BACKUP/RESTORATION FUNCTION
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15.2 Restoration Function
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