Upkeep and maintenance 
  6.3 Firmware update via WBM or CLI not possible 
SCALANCE W774-1 /W734-1 
Operating Instructions, 07/2020, C79000-G8976-C325-14 
53 
Solution 
You can then also assign firmware to a SCALANCE W using TFTP.  
Follow the steps below to load new firmware using TFTP: 
1.  Turn off the power to the device. 
2.  Now press the Reset button and reconnect the power to the device while holding down 
the button. 
3.  Hold down the button until the red fault LED (F) starts to flash after approximately 2 
seconds. 
4.  Now release the button. The bootloader waits in this state for a new firmware file that 
you can download by TFTP. 
5.  Connect a PC to the SCALANCE W over the Ethernet interface. 
6.  Assign an IP address to the SCALANCE W with the SINEC PNI. 
7.  Open a DOS box and change to the directory where the file with the new firmware is 
located and then execute the command "tftp -i <ip address> PUT <firmware>". As an 
alternative, you can use a different TFTP client. 
8.  Close the cover to ensure that the device is closed and water and dust proof. 
Note 
Use of CLI and TFTP in Windows 10
 
If you want to access the CLI or TFTP in Windows 10, ma
ke sure that the relevant 
functions are enabled in Windo
ws 10. 
Result 
The firmware is transferred to the device.  
Note 
Please note that the transfer of the firmware can take several minutes. During the 
transmission, the red error LED (F) flashes.
 
Once the firmware has been transferred completely to the device, the device is restarted 
automatically.