Communication with BACnet is done through objects and properties.
The AC500 B-BC server of the figure below is represented as a BACnet device object with “ID 12”. The device contains more objects like the Analog Input object, representing the input of a temperature measurement device. An object contains several properties, like “ID, Description, Present Value, Unit” etc.
Further possible objects of an AC500 B-BC are:
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“Binary Input” for example from connected to a switch
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“Analog / Binary Output” for actuators
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“Analog / Binary Values” for local variables
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“Calender”
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“Schedule”
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“Trend Log”
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...
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A list with all details can be found in the Automation Builder pdf document ABB-B-BC-PICS-AC500_V3.pdf. Help/Project examples/.
Fig. 251: BACnet objects, properties, services and BIBBs
