There are two ways to set the IP as static on BSN.cloud.
During the profile creation on BSN.cloud, there is an option for the network configuration:
If the player however is already created, select the player from the list (1) and then expand the Network Settings menu (2).
The expanded Network Settings look as follows:
If the settings are disabled, this message will be shown:
To enable the Network Settings for editing, go to the list of the players again. Click on the settings icon (the gear icon) left of the Player ID. This will open the DWS. Go to "Advanced". There by the "Property Lock" settings, check the checkbox for "Overwrite Presentation Settings". Confirm this by clicking on "Set".
After that, the player will reboot and the "Player Lock setting" will be "Disabled". Now, it is possible to edit the Network Settings on BSN.cloud.