Cause : EEPROM check code error comes when the check code of the EEPROM is broken, so erroneous data is retrieved. If the check code does not match the expected value, it suggests that the data in the EEPROM may be corrupted or altered.

"alarm 37" in panasonic servo drive indicate "EEPROM check code". This means a discrepancy in the checksum or check code associated with the EEPROM memory. This check code is used to verify the integrity of the data stored in the EEPROM.

Troubleshooting Steps:

1. Power Cycle the Drive:

• Restart the Drive: Turn off the servo drive, wait for a few moments, and then turn it back on. Sometimes, a power cycle can resolve temporary errors related to EEPROM check code mismatches.

2. Inspect and Reset Parameters:

• Parameter Verification: Check the parameters stored in the EEPROM. If you have a backup of the parameter settings, compare them to ensure no unintended changes or corruption.
• Reset to Default: If the parameters seem to be corrupted or if you are unsure about their integrity, reset the drive to its default settings. This can sometimes resolve check code errors by restoring a known good state.
• Reconfigure Parameters: After resetting, reconfigure the drive with the correct parameters for your application.

3. Update or Reinstall Firmware:

• Firmware Update: Look for any available firmware updates for your servo drive model. Updating the firmware can address known issues related to EEPROM handling.
• Reinstallation: If the firmware is already current, consider reinstalling it to ensure that no corruption has occurred in the firmware that might be affecting the EEPROM.

4. EEPROM Integrity Check:

• Manual Diagnostic: Some servo drives offer diagnostic tools to manually check the integrity of the EEPROM. Refer to the drive’s manual to see if such a function is available and how to use it.
• Reinitialize EEPROM: If possible, some drives allow you to reinitialize or reformat the EEPROM, which can clear up errors related to corrupted data. Be cautious with this step as it will reset all parameters.