Cause : Serial memory flash format error comes when an issue with the formatting of the internal flash memory on a device. This flash memory is often used to store configuration settings, firmware, or even small files on various electronic devices.

"INFF" Internal error 15 fault in Schneider ATV950 drive indicate there is "an issue with the drive's flash memory". This error typically means that the memory used for storing firmware, parameters, and configuration data is corrupted or not accessible properly.

Possible Causes:

1. Corrupted Flash Memory: The flash memory itself might be corrupted due to wear and tear, electrical issues, or unexpected power surges.
2. Formatting Error During Update: If the error occurred during a firmware update process, the formatting operation might have been interrupted or incomplete.
3. Software Bug: In rare cases, a software bug in the device's firmware could be causing the formatting issue.

Steps to Address a Serial Memory Flash Format Error:

1. Immediate Actions:

   • Stop Operation: If the drive is running, stop it to prevent any potential damage or unsafe conditions.
   • Reset Error: Attempt to reset the error using the drive’s control panel or through the connected control system. This may clear temporary issues.

2. Power Cycle the Drive:

   • Power Off: Turn off the power to the drive.
   • Wait: Wait for a few minutes to ensure all capacitors discharge fully.
   • Power On: Turn the power back on and see if the error persists.

3. Update Firmware:

   • Firmware Version: Ensure the drive is running the latest firmware version. Firmware updates can fix bugs and improve functionality.
   • Update Process: Follow the manufacturer’s instructions to update the firmware if necessary. Ensure that the firmware file is not corrupted by downloading it from an official source.

4. Perform a Factory Reset:

   • Factory Settings: Perform a factory reset to revert the drive to its default settings. This can help clear any corrupted data in the flash memory.
   • Reconfiguration: After resetting, reconfigure the drive settings according to your application requirements.

5. Check for Electrical Noise:

   • Noise Sources: Identify and mitigate any potential sources of electrical noise that could be affecting the flash memory. This includes ensuring proper grounding and shielding of the drive and its wiring.
   • EMI/RFI Filters: Ensure that any installed EMI/RFI filters are functioning correctly and consider adding them if none are present.

6. Inspect Drive Components:

   • Internal Components: If you are qualified, open the drive and inspect the internal components related to the flash memory for any obvious issues.
   • Flash Memory Module: Inspect the flash memory module for physical damage or loose connections.