I need serve data throught OPC from 800xA System to another Foxboro System, I need a special OPC License?
for third party OPC client connections to 800xA system you do need a license. check the following from System 800xA 5.1 Product Catalog (3BSE062937)
800xA OPC Client Connection, 800xA 5.1
This enables third party OPC clients to connect to 800xA via the 800xA OPC server. One per external access.
Article no. 3BSE061245R1