Collecting device history
The
Trend Logs device extension under the BacnetDevice imports BACnet Trend Log objects from the device to the station as Framework histories. For general information on this device extension, refer to
the Niagara Drivers Guide.
Prerequisites: Device history exists.
- Double-click the node in the Nav tree.The Bacnet History Import Manager view opens.
- Click the Discover button.The driver discovers all trend logs (histories).
The screen capture shows three trend logs already imported into the station.
- To import trend logs or trend log multiples, select them in the Discovered pane and click Add.The Add window opens.
This window shows some of a Bacnet History Import component’s properties.
After adding, you can access additional Bacnet History Import properties from the Property Sheet of any BacnetHistoryImport and BacnetTrendLogMultipleImport components.
- Edit properties and click OK.
- If you are using the Bacnet Trend Multiple View, double-click a record.The Record window opens.
This example shows a trend log multiple with three trend items: two properties of object AI1 (Present_Value and Status_Flags) and one property of object AI100 (Present_Value).
The separate histories created by importing a trend log multiple objects are also recognizable in the station’s Nav tree (below).
By default, the name of each 
history associated with a trend log multiple import uses the format of TrendLogMultipleName_objectName_propertyName, for example TM1_AI1_presentValue.