An embedded control system for a field device of an automation system, comprising: a diagnostic application interface to a backend server for signal analytics information, complex event pattern information and diagnostic information; a physical process interface to a signal source for transferring signal data; a signal evaluation component for comparing received signal analytics information with received signal data to identify at a first and a second event; an event processing component for applying received event pattern information to at to the first and second identified events to identify at a first classified event; a diagnostic reasoning component for deriving causal dependencies between the first classified event and a further classified event with regard to diagnostic information to identify a root cause for the first classified event, or predict an impact of the first classified event. The diagnostic reasoning is pushed down to the field level with embedded data analytics functionality.
