Starting in the 3.6.41 build of the BACnet driver, client support was add for BACnet Trend Log Multiple objects. Using the Bacnet History Import Manager, each Trend Log Multiple object imported into the station has an available Bacnet Trend Log Multiple View on its associated BacnetTrendLogMultipleImport descriptor.

As shown in Figure 58, this view provides tabular access to recorded values for all items referenced in the Trend Log Multiple object, along with status and sequence information.

You can double-click any record (row) in the Bacnet Trend Multiple View for a popup window showing this same information, as shown in Figure 59. This example Trend Log Multiple shown has three different items trended—two properties of object “AI1” (Present_Value and Status_Flags) and one property of object “AI100” (Present_Value).

The separate Niagara histories created by importing a Trend Log Multiple object are also recognizable in the station’s Nav tree, as shown in Figure 60 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, as shown above.