BACnet Server

This section provides background information about BACnet Server. For procedures or workflows, see the step-by-step section.

Overview

BACnet Server functions as a gateway that allows you to monitor and control Desigo CC objects through BACnet. You can use BACnet Server to create virtual devices and then display any Desigo CC objects and properties as BACnet objects. Virtual devices are useful for logically grouping objects corresponding to organizational structures, floor plans, and physical devices.

For example, you might have a multi-floor research center with thermostats on each floor controlled by different physical devices. You can drag the objects from those devices into one virtual device named Research Center Thermostats to monitor and control the thermostat objects from one convenient location in System Browser.

Objects BACnet Server Exposes

BACnet Server can expose Analog, Binary, Multistate, and Trend log (online/offline) objects. To be exposed, the source property in Desigo CC must be one of the following data types: Boolean, unsigned int, int, or float.

BACnet Server cannot expose any complex data type, string, date/time, or bit string objects.

Security Consideration

Be careful about exporting validated or fire system objects that might invalidate a UL listing or other standard. By default, all exported objects are read only, but you can configure write access for them if needed.

System Recommendations

• Maximum of 20,000 exported objects polled at a 15 to 30-minute interval.
• For near live data, a maximum of 300 objects polled at 5 or 10 seconds.
• For management station subsystem values, you can select COVs or Read on Demand. For any subsystem that reads slower than a few milliseconds, use COVs.