OPC United Architecture OPC UA Seamless machine-to-DCS or Cloud communication protocolIdeal communication protocol for the implementation of Industry 4.0 Image courtesy of B&R Automation Back to Controls Summary Product DescriptionOPC ServerTightly Integrated within the B&R PLC controlPlatform/vendor independent horizontal and vertical communication protocolVertical communication with SCADA, MES, DCS and ERP systems as well as vendor-independent communication from PLC to PLC