Boot Project CRC Error

What does E4-19 mean?

A Cyclic Redundancy Check (CRC) error was detected in the boot project. This indicates that the boot project data is corrupted, preventing the Safety PLC from loading it correctly and initializing its operations.

• Corruption of the stored boot project data within the Safety PLC's non-volatile memory (e.g., flash), potentially due to power fluctuations during a write cycle.
• Incorrect or incomplete project download to the Safety PLC, resulting in an invalid CRC signature after a firmware update or project change.
• Firmware incompatibility issues between the uploaded project file and the Safety PLC's currently installed firmware version.
• Hardware degradation of the internal memory components of the Safety PLC module, leading to data read errors.

Click steps to track your progress.

1. 1

   Attempt to re-download the correct boot project file to the Safety PLC using the engineering software, ensuring a stable connection throughout the process.

2. 2

   Access the Safety PLC's diagnostic interface and perform a memory format or factory reset (if available) before retrying the project download.

3. 3

   Verify the firmware version of the Safety PLC matches the required version for the installed project file (e.g., check via device details in engineering software).

4. 4

   If the error persists after re-download and memory format, consider replacing the Safety PLC module as an internal hardware fault may be present.