800xA OPC Server Siemens PCS7
if you're using PLC connect, then everything is done using Bulk Data Manager.
Create the objects, connect the OPC paths, and activate all through BDM.
Details are in the Manuals.
Uploading is really only done when using Generic OPC connect, or if your PLC OPC Server configuration happens to match exactly the way you want to present data in 800xA objects.