CPU Backup Failed

What does E3-48 mean?

A backup operation on the CPU, such as saving configuration or application data, has failed. This means recent changes may not be properly archived, putting critical data at risk in case of a system failure, power loss, or accidental deletion. Regular backups are crucial for system recovery.

• Insufficient free space on the backup destination (e.g., CPU internal flash, SD card, network share).
• Corrupted file system on the backup media (e.g., SD card, USB drive) preventing write operations.
• Network connectivity issue preventing transfer to a remote backup server (e.g., Ethernet cable X1 unplugged, incorrect IP address P7-01).
• Read/write permission error on the destination storage location (e.g., network share access denied).
• CPU internal memory corruption preventing a consistent backup image capture.
• Firmware bug in the backup routine that fails to handle specific data structures or sizes.

Click steps to track your progress.

1. 1

   1. Verify available free space on the target backup device (e.g., check 'Filesystem Status' in CPU diagnostics).

2. 2

   2. If using an SD card or USB drive, remove it, connect to a PC, check for errors, and format if necessary (FAT32 or exFAT).

3. 3

   3. If backing up to a network share, verify network cable connection (Ethernet port X1), IP address (Parameter P7-01), and access permissions on the share.

4. 4

   4. Attempt a manual backup via the programming software's 'Upload/Download' function to isolate if the issue is with an automated backup task.

5. 5

   5. Check CPU internal logs for specific errors related to storage device access or network communication failures.