Process events and alarms

There are two different kinds of events stored in RTDB.

External Events

In case RTDB is connected to System 800xA or to any third-party OPC A&E server, it can store the history of the events that the A&E server is generating. Those events are described here as "external events".

See External events page for more information on external events.

Internal Events

Another mechanism to create event information is to monitor the changes that are occurring in the database and create events based on these changes. In that case, the events would be called "internal events". A good example would be to monitor changes in current value processing using event triggers. For example setting a trigger to create an event when the value exceeds some predefined limit (e.g., "Low limit" or "High limit").

See Internal events page for more information on internal events.

In addition, RTDB C# calculations or any third-party applications e.g., on top of ODBC, could be used to create either external OPC events or internal events.