An integral aspect of the project SePiA.Pro is the aggregation of available data sources. During today’s industrial production, numerous machines already use the OPC UA standard. This standard is an industrial communication protocol, which enables both transmission of data and their semantic description. OPC UA represents a reliable means to transport data from the level of field devices up to the entreprise system and production planning systems. In addition, OPC UA is a non-proprietary protocol based on standard TCP/IP communictaion. It includes means for encyrption/decryption and offers programming interfaces for several languages.