OPC UA is a platform-independent, service-oriented communication architecture for reliable, secure and multisupplier data transport from the production level to the production planning and ERP system or to the cloud. ? TwinCAT OPC UA Server supports the following OPC UA functions: Data Access, Historical Data Access, Alarms & Conditions Intermediate storage of data on the server: interruption of the communication connection does not lead to loss of data. graphical configurator for simple handling of local and remote OPC UA servers definition of user/groups-based access rights at namespace and node level support of client/server certificates to establish secure communication support of the TwinCAT Analytics file format for Historical Access ? TwinCAT OPC UA Gateway high-performance, free-of-charge OPC COM DA server enables aggregation of multiple, subordinate TwinCAT OPC UA servers support of client/server certificates to establish secure communication ? TwinCAT OPC UA Client supports OPC UA communication with remote OPC UA servers available as PLCopen-compliant PLC function block or as TwinCAT I/O device support of client/server certificates to establish secure communication automatic code generation A technological overview of OPC UA products and further information can be found here.