Cause : ACX: Parameter back-up file missing - comes when downloading the device parameterization, a parameter back-up file PSxxxyyy.ACX associated with a drive object cannot be found.

If you have saved the project data using the commissioning software, carry out a new download for your project. Save using the function "Copy RAM to ROM" or with P0971 = 1 This means that the parameter files are again completely written into the non-volatile memory.

Note: If the project data have not been backed up, then a new first commissioning is required.