Troubleshooting
7
7.1 Downloading new rm
ware using TFTP without WBM and CLI
Firmware
The rmware is signed and encrypted. This ensures that only rmware created by Siemens can
be downloaded to the device.
You can download new rmware to the device using TFTP. To do this, the device does not need
to be reachable either using Web Based Management (WBM) or using the Command Line
Interface (CLI). This can be the case if there was a power failure during a rmware update.
When pressing the button, make sure you adhere to the instructions in the section "Reset
button (Page30)".
To load a new rmware via TFTP, follow these steps:
1. Turn o the power to the device.
2. Loosen the screws of the cover.
3. Remove the cover.
4. Press and hold down the reset button.
5. Connect the device to the power supply again while holding down the button.
6. Hold down the button until the red fault LED "F" starts to ash after approximately 2 seconds
(500ms on/500ms o).
7. Release the button. The F-LED lights continuously red.
The bootloader waits in this state for a new rmware le that you can download using TFTP.
8. Connect a PC to the device over the Ethernet interface.
9. Assign an IP address to the device using DHCP or the SINEC PNI.
10.Open a DOS box and change to the directory where the le with the new rmware is located
and then execute the following command:
tftp -i <IP address> put <firmware file>
As an alternative, you can use a dierent TFTP client.
Once the rmware has been transferred completely to the device, there is an automatic
restart on the device. This process can take several minutes.
11.Close the cover (torque 0.8 Nm) to ensure that the device maintains the degree of protection
IP30.
SCALANCE MUM853-1
Operating Instructions, 03/2023, C79000-G8976-C650-05 63
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