Boot Project Load Failed (Unspecified Reason)

What does E3-47 mean?

The CPU failed to load the boot project for an unspecified reason. This general error indicates a problem during the loading process that could stem from various issues, including corrupted project files, transient hardware issues, or firmware problems. Further investigation is needed to pinpoint the cause.

• Corrupted project file on the CPU's internal flash memory due to an abrupt power loss during a save or write operation.
• Firmware instability or a bug preventing the CPU's bootloader from executing the proper boot sequence.
• Hardware fault within the CPU's memory or core bootloader circuit.
• Invalid or incompatible boot image stored on the CPU's flash memory partition.
• Insufficient memory allocated for the boot project in CPU parameters (e.g., Parameter P1-20 Boot Partition Size).

Click steps to track your progress.

1. 1

   1. Perform a CPU power cycle (turn off power, wait 30 seconds, then restore power).

2. 2

   2. Connect to the CPU with programming software. Perform a full project download, ensuring a complete memory clear is selected.

3. 3

   3. Verify the CPU's firmware version. If available, perform a firmware re-flash to ensure the integrity of the bootloader.

4. 4

   4. Check the CPU diagnostic LEDs for specific patterns that might indicate a hardware failure (refer to the CPU manual for LED codes).

5. 5

   5. If using an SD card for boot, try removing it and downloading the project directly to internal memory, or format/replace the SD card.