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Does TOP Server support OPC .NET 3.0?
Does TOP Server support the OPC Foundation's OPC .NET 3.0 interface?
Yes - OPC .NET 3.0 is another name used by the OPC Foundation to refer to OPC Xi or the OPC Express Interface, the Microsoft Windows Communications Framework (WCF) based solution for users of existing OPC interfaces.
In short: OPC .NET 3.0 = OPC Xi = OPC Express Interface
OPC Xi (and thus OPC .NET 3.0) is supported in TOP Server Version 5.4 and higher.