The first response of the OPC Foundation to the rising limitations related to the adoption of the COM and DCOM architecture was the development of OPC XML-DA. This kept the fundamental characteristics of OPC, but adopted a communication infrastructure that is not linked either to a manufacturer or to a specific software platform. The conversion of the OPC-DA specifications into versions based on web services was not enough to fulfill the needs of factories that increasingly interact and integrate with the corporate and the external world.
The OPC UA was therefore developed with the aim to replace all existing COM-based versions and overcome security and performance issues, satisfying the need for platform-independent interfaces and ...
