I know this is an old post, but I believe you were asking if you need to have static tags configured in Kepware in order to read the tags into Ignition through the Ignition OPC client. The answer is No, you do not need static tags configured in the Kepware OPC UA server in order to read the PLC data. This is at least true for the Rockwell ControLogix driver by Kepware. I don't have experience with others.
Similar post.
Directly access Contrologix PLC tags through Kepware - General Discussion - Inductive Automation Forum