BECKHOFF CP-Link3 - Manual (Page 27)

Page 27
If it is necessary to make modifications in the Windows Firewall, the following dialog will appear when clicking on the
Broadcast Search button:
The UPnP service is authorized in the Windows Firewall by clicking Yes . Clicking No will leave all the Windows Firewall
settings unchanged, as a result of which it will not be possible to search through the Broadcast Search .
If the Windows Firewall is properly configured, then clicking the Broadcast Search button will open the CP-Link 3
Broadcast Search window. A click on Start Search in the Broadcast Search window will start the search for UPnP devices
in the network:
The desired device can be added by clicking the Add button or by double-clicking, and will then appear in the client list.
Whether or not the IP address of the new device is already present in the client list is checked when a client is added. If
it is, a dialog opens through which the action can be cancelled or the client overwritten.
If clients have just been added to the client list, they remain marked in green in the status field in front of the client name
until the changes have been adopted by clicking Apply .