Going Online and Transferring the Project Data 5.6. Go online with the controller and transfer the project data. Precautions for Correct Use Please confirm that the LAN cable has been connected before proceeding to the following steps. If it is not connected, turn OFF the power to the devices, and then connect the LAN cable. 15 1 To go online with the Controller select Communications – Who Active. The Who Active window will appear. Select the controller to program, 1756-L71 Logix5571, L71, and then Download. Select the Download button from the Download window.