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This may be due to drive Locking.
When the auto-tuning trial is unsuccessful for your drive, the drive is Automatically locked by the auto tuning fault management (tnl==Yes) due to the ( [AUTO TUNING FAULT] (tnF) indication.
So, to un-lock the Drive configurations modification, you can use any of the following codes according to your case:
· In case of: No Preset Password: [MONITORING] (SUP-) menu ----> (COd) function ----> [OFF].
If the Lock still exists, thanks to check the Access locking switch position as in the picture below: