Wrong safety checksum

What does F01660 mean?

This fault occurs when checksums related to safety commissioning are inconsistent, preventing the drive from exiting the commissioning state. This indicates that safety parameters in p9798, p9799, p9898, or p9899 do not match as required, signaling a configuration error that must be resolved for safe operation.

• Discrepancy between the calculated checksum of active safety parameters and the stored reference checksum (P9798, P9799).
• Corruption of safety parameters in non-volatile memory (e.g., flash, EEPROM) due to power fluctuations or internal errors.
• Incomplete or failed transfer of safety parameters from an engineering tool during commissioning, leading to an inconsistent dataset.
• Attempted firmware update or downgrade without performing a full safety reset and re-commissioning of safety parameters.

Click steps to track your progress.

1. 1

   1. Compare the current safety checksum (e.g., r9799.0) displayed on the HMI or engineering tool with the expected checksum from the project file.

2. 2

   2. Perform a safety acknowledgment (e.g., P1002=1) and then re-upload all safety parameters from the engineering software to the drive.

3. 3

   3. Execute a full safety parameter reset to factory defaults (e.g., P9501=1) and then recommission all safety functions from scratch.

4. 4

   4. Verify the integrity of the drive's firmware version, ensuring no mismatch between the main firmware and safety module firmware.

5. 5

   5. Check the 24VDC control power supply for stability and proper voltage levels during the parameter transfer and storage process.