Description of the device   
3.4 RESET button 
  SCALANCE XR-300WG 
24  Operating Instructions, 05/2017, C79000-G8976-C454-01 
●  The device is in operation. 
●  The function "Reset to factory defaults" is enabled for the RESET button. 
 
Note 
Reset despite disabled "RESET" button 
If you have disabled the "Reset
 to Factory Defaults"function for the "RESET" button in the 
configuration, this does not apply during the startup phase, see section "
Restoring the 
 (Page 48)" 
If the function has been disabled in the configuration, it is only disabled on completion of 
the startup phase.
 
To reset the device to the factory defaults during operation, follow the steps below: 
1.  Press the "RESET" button. 
2.  Hold down the button for approximately 12 seconds. 
After 9 seconds, the fault LED "F" flashes for 3 seconds. 
–  If you release the button after approximately 12 seconds, the device is restarted and 
the factory settings are restored. 
–  If you release the button before the 12 seconds have elapsed, the reset is canceled. 
Enabling and disabling the button 
In the configuration, you can enable or disable the button function.