You want to make a template that automatically maps Desigo CC object models to BACnet object models.
Select Project > System Settings > Libraries > L1 Headquarter > Global > BACnet Server.
From the Library Configurator tab, click Add new object, and then select New BACnet Server Mapping.
NOTE: If you are not an HQ Librarian, you must customize the library to the project level and add the New BACnet Server Mapping library block before continuing.
In System Browser, select Manual navigation.
Select Project > System Settings > Libraries > L1 Headquarter > BA > Device > [device name].
Expand Object Models.
Drag the object model(s) to the BACnet Server Library Mapping section.
Do the following as needed:
For each source object, select a corresponding object from the BACnet Mapping list.
Select or clear the Alarmable check box. NOTE: Selecting the Alarmable check box displays all available source properties. Clearing the check box displays only non-alarmable source properties.
For each BACnet Property, select a corresponding property from the Source Property lists.
, and then select New BACnet Server Mapping. 
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