Persistent data backend for OPC UA namespaces in IT infrastructures

This paper presents an approach for persistent data backends for OPC UA namespaces. OPC UA as M2M protocol is used in various manufacturing machines and provides data access to e.g. sensors and setpoints. The central and persistent data storage for e.g. data-mining and condition-monitoring services in information technology infrastructures is challenging. Therefore, a holistic approach for storing OPC UA information in lightweight directory access protocol server is presented including a model for storing namespaces, information models and values in LDAP trees of scalable enterprise infrastructures to fulfil manufacturing and IT requirements in the context of Industry 4.0.