To access the property sheet of a BacnetHistoryImport component (or BacnetTrendLogMultipleImport component), right-click it from either the Nav side bar, or within the Database table of the Bacnet History Import Manager (as shown in Figure 49).
The “Config Overrides” properties (capacity, fullPolicy) work as they do in the “History Config” properties of a normal history extension. See the “Configure history extension” section in the User Guide for more details.
Four of the last five properties affect the special collection process from the imported Trend Log object, and are described as follows:
-
Reference Time
Provides a Date and Time for reference.
-
Max Records By Request
Defines the maximum Trend Log records that can be archived (0 to
max), with default of 0. Note that with the 0 default, Niagara asks for 10 records per request. -
Always Request By Reference Time
Whether Trend Log records should always request against the reference time. Default is
false. -
Last Sequence Number Processed
Shows the highest numerical BACnet sequence number processed. Note that sequence numbers are included in the imported Niagara history. See About histories imported from Trend Logs, including the relevant Note.