You have read the reference for BACnet protocols at Reference for configuration > Connectivity > BACnet driver.
In the Subsystem Desigo Building Automation expander, enter a name in the Driver description field.
In the Port settings expander, select either protocol BACnet IPv4 or BACnet/SC and edit the data as needed in the following field: NOTE: The field varies based on the selected protocol.
Port ID
Network number
Network adapter
IP address
Router
UDP port
Instance number
Select Activated under Monitor hardware, if a fire control panel is used that support client monitoring. Enter the associated number in the Client number field.
(For BACnet Ipv4) In the BACnet Advanced Connectivity expander, enter one of the following options in the Type drop-down list:
None
Foreign device a. In the UDP port field, enter the port number. b. In the IP address field, enter the address.
BBMD a. Click Add. b. Enter the IP address, UDP port and Subnet mask.
(For BACnet Secure Connect) Proceed as follows in the Secure Connect Settings expander:
Add a Primary URI with syntax ws://<IP address or machine name>:<port number>. Use wss instead of ws when using certificates.
(Optional) Add a Failover URI in the event the primary URI cannot communicate. NOTE: The Primary and Failover URIs must be different.
(Optional) Select Allow self-signed certificates if you created your own certificate.
Click Browse next to the CA certificate field and select a certificate from the list.
Click browse next to the Operational certificate field and select a certificate from the list.
Enter a Password for the private key.
Click Next Page . NOTE: The driver starts automatically prior to data import.