I have an IPC hosting WinCC RT V14 Advanced SP1 Upd8 connected via X1 to PLC.

I need to run an OPC UA server to get data to a SCADA runtime (V16 Unified). I can not connect the PLC direct (no access, third party machine). X1 and X2 are on separate subnets (local and corporate)

I've enable OPC UA in the runtime and created the connection in my unified project but I can not online view the tags. This I guess is because S7ONLINE access is set to X1 whereas I need it on X1 AND X2.

Is this possible? If so, how? 

ChristophD

not possible , s7online can only use 1 interface

 Ok, not the answer I wanted but is what I suspected. 

If I change the S7online interface to x2 to set up opc tags at client, when changing back to x1 will my client runtime still be able to read the tag data via opc ua on x2?

Again not what I want to hear.

To clarify, Server is WinCC RT V14 SP1 Advanced on an IPC, Client is WinCC PC RT V16 Unified. 

I've got OPC UA enabled on server, need to read OPC tags on client. X1 is direct to PLC, X2 is to client. I can not have them on same profinet. 

Am I missing something? How can I get the tag data from server to client? 

Please advise how? 

I was thinking maybe bridging network connections on IPC? Could this work?