View alarms and events

AVEVA Historian Client supports AVEVA Application Server alarms and events captured through AVEVA Historian (including replication) or the AVEVA Historian SDK. This feature does not support alarms and events from the Microsoft SQL databases, WWALMDB, A2ALMDB, and AVEVA Insight.

For more information on Application Server events, see the AVEVA System Platform documentation.

When you include tags with associated alarms and events in a trend, those alarms and events are displayed as part of your trend.

Note: Alarm and events for discrete and string tags are not supported in Trend.

In a trend, AVEVA Historian Client can display:

Note: Events can appear in the display area for a chart even if no tag data is available.

When the displayed timeframe includes one or more tags with more than 30 events, individual event icons are replaced with Multiple Events icons.

If more than 100 events per tag occur within the displayed timeframe, you'll see no icons Instead, you'll see a message in the status bar saying there are too many events to display. In this case, you can zoom in to see more events details.

To enable Alarms and Events in your trend

1. From the Tools menu, click Options.

2. Mark the Enable Alarms and Events (from Historian data blocks only) check box.

To disable Alarms and Events in your trend

3. From the Tools menu, click Options.

4. Clear the Enable Alarms and Events (from Historian data blocks only) check box.

To view event icons when none display

• To see individual event icons, select a smaller timeframe from the Time toolbar.

  For example, if you see Multiple Events icons when the Time toolbar is set to 1 hour, try setting it to 30 minutes to view individual event icons.

To view details about a single event

• Hover over the event icon to see its details.

  

  To view details about an alarm state Click anywhere on the highlighted area.