BACnet Data Points
This chapter describes how BACnet object data is modeled in WinCC OA. It also describes how a WinCC OA data model (data points and configuration) is created by the BACnet Engineering Explorer.
A WinCC OA DPT is created for each BACnet object type required in the project. The structure of the DPT is generated dynamically based on the configuration files:
- data/bacnet/BACNet_objecttype_mapping.cat
- data/bacnet/BACNet_properties_mapping.cat
- data/bacnet/BACnet_objectTypeConfig.dat
The first two files are also used by the BACnet driver and they should not be changed. In the last file you can define:
- If some properties should not be created in WinCC OA because they are not required in the current application. This allows the size of the DPT to be reduced.
- The address modes for the various properties, e.g. if the direction (input, output) is to be adjusted.
- The used poll group for the property addresses
For details refer to the comments in the BACnet_objectTypeConfig.dat configuration file.
For the list of supported object types, see BACnet certification.
