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(7) Precautions
• Do not perform the following operations during data backup.
• Even when parameters that are backed up using contacts are booted to the Universal model QCPU whose
serial number (first five digits) is "10101" or earlier, parameters are ignored. In this case, even if the backup
start setup contact or backup start contact set in parameter is turned on, the operating status of the CPU
module does not change. (No diagnostic error is detected.)
• When the data backup operation is ready, the CPU module stops the operations of the following functions.
The operations do not resume even after the data backup operation ends.
• Data cannot be backed up while data logging is being executed. Stop the data logging processing, and then
start the data backup operation. For how to stop the data logging processing, refer to the following.
QnUDVCPU/LCPU User's Manual (Data Logging Function)
• If the data backup processing is performed while the CPU module is locked with a security key, an error
occurs.
• Insertion/removal of a memory card or SD memory card
• Power-off of the CPU module
• Reset
• Refresh of network modules
• Refresh of CC-Link IE Field Network Basic
• Data link transfer
• Auto refresh of intelligent function modules
• Auto refresh of CPU shared memory
• Simple PLC communication function
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