KepServer Enterprise provides all the third-party drivers for PanelView Plus. RSLinx Enterprise provides the Rockwell Automation drivers for PanelView Plus.
KepServer Enterprise is installed automatically along with FactoryTalk View Studio. The runtime licenses are embedded in the PV+ terminal; you do not have to buy or install any licensing for KepServer Enterprise on the PV+.
You need to configure KepServer Enterprise to connect to the Siemens controller and set it up with a tag database and Siemens registers. FactoryTalk View Studio can then browse the KepServer tag database during development and runtime (on your development PC and on the PV+ terminal).
To load a specific driver onto the PanelView Plus, you perform a firmware update of the panel with the KepServer driver as part of the firmware update. I only add one driver at a time to the PV+.
The KepServer Help file and the FTView Studio User Manuals (navigate to the Online Books section to launch them) have some good information on these. EDIT: Thanks, Jesper, for the Knowledgebase link.
What is your Siemens controller type, and what connection and protocol are you going to use ?