Boot Project Download Error

What does 8476 mean?

An error occurred during the process of downloading the boot project to the Safety PLC. This means the PLC failed to properly receive or store the essential program required for its startup and initial operation. Consequently, the PLC may not boot correctly or execute any safety-critical applications, rendering it non-functional or unsafe.

• Incompatible boot project version with the safety PLC's firmware or hardware revision.
• Corrupted boot project file being downloaded from the engineering station.
• Communication issues (e.g., Ethernet cable fault, network configuration) between the engineering station and the safety PLC during download.
• Insufficient memory space on the safety PLC for the boot project.
• Flash memory write protection enabled or flash memory defect preventing the boot project from being stored.

Click steps to track your progress.

1. 1

   Verify the boot project version is compatible with the safety PLC's firmware version, checking manufacturer documentation.

2. 2

   Check the Ethernet communication cable between the engineering station and the safety PLC for proper connection and integrity.

3. 3

   Ensure the safety PLC has sufficient free internal memory for the boot project by checking its memory status via online diagnostics.

4. 4

   Attempt a full memory reset (e.g., "MRES") on the safety PLC to clear any existing projects or corrupt data before attempting a re-download.

5. 5

   Try downloading a minimal, empty boot project or an older, known-good boot project to test the download mechanism.

6. 6

   Replace the safety PLC CPU module if the boot project download error persists despite verifying communication and memory.