No problem, I do urge you to read the manual in the link above though.
I will copy and paste the next section to help you out here
2.2 Assign devices
Assign devices has to be used every time when you add or remove a device to / from the PAB or if you change extension cards within an Expansion Box. You have to select always all PAB devices also if they have already been assigned once before.
Hint
Before the devices can be assigned, all connections have to be established completely. Therefore the power supply of all PAB devices has to be secured. If this is not guaranteed, the bus is interrupted and not all PAB devices can be addressed. Also all extension cards have to be installed already in their Expansion Box at that time.
With Assign devices the whole PAB is searched for devices and afterwards their serial number is displayed. All devices which you would like to assign to ProfiLux, have to be selected with the arrow keys. If a PAB device is already assigned to another ProfiLux then you deprive the other ProfiLux the corresponding device with your choice.
Hint
Arrow up/down: to navigate in the list of the PAB devices
Arrow right: selection of the marked PAB device
Arrow left: removes the selection of the marked PAB device
Return: terminates the assignment
When the selection has been finished and has been confirmed with Return, ProfiLux adds all PAB devices that have been selected to its group. Afterwards the new sensor inputs, sockets, interfaces etc. are determined and stored in ProfiLux.
Hint
If not all devices are found, you should check the PAB connection and the power supply of all PAB devices.