User Manual

BACnet/IP networks

Designing BACnet/IP networks

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IP/VLAN overview

Network designation VLAN ID Subnet Address range Default gateway

BA_TRA_01 1 255.255.255.0 192.168.11.1 -- 254 192.168.11.254

BA_TRA_02 2 255.255.255.0 192.168.12.1 -- 254 192.168.12.254

BA_TRA_03 3 255.255.255.0 192.168.13.1 -- 254 192.168.13.254

BA_TRA_04 4 255.255.255.0 192.168.14.1 -- 254 192.168.14.254

BA_Mgmt 5 255.255.255.0 192.168.15.1 -- 254 192.168.15.254

BA_Hvac 6 255.255.255.0 192.168.16.1 -- 254 192.168.16.254

BA_CC_BuB 7 255.255.255.0 192.168.17.1 -- 254 192.168.17.254

BA_Rfm 10 255.255.255.0 192.168.20.1 -- 254 192.168.20.254

DMS_FS20 11 255.255.255.0 192.168.21.1 -- 254 192.168.21.254

An IP segment can also be divided on a project-by-project bases into a part with static addresses, e.g.

automation stations, etc., and a dynamic part (DHCP), e.g. for engineering laptops.

As an alternative, you can also work in general with DHCP. You must ensure, however, that the stations

always have the same IP address. This applies to:

● BACnet device that assume BBMD functionality.

● Room automation stations with an on-board web server and are operated with ABT SSA for servicing

and diagnostics.

● Room operator units, such as QMX7.

Planning and implementation, BACnet network

Each Desigo PXC... automation station should have FDT functionality for maintenance and diagnostics and

remote access.

A BACnet internetwork must be set up. Each IP segment becomes a BACnet network.

A BBMD must be used in each IP segment in order for BACnet and IP networks to interact. This permits

isolating local broadcasts from the flexible room management (room/room segment). Global broadcasts,

originating from central functions, are managed on the BACnet device that assumes the BBMD

functionality by asymmetrical BDT entries (Broadcast Distribution Table).

Set up the device accordingly in the XWP network configurator. The following is a overview of the BACnet

configuration:

Device name BNR501 ISP01AS01 F1BNR01 F2BNR01 F3BNR01 F4BNR01

Device Type PXG3.M PXC100-E.D PXG3.M PXG3.M PXG3.M PXG3.M

IP address 192.168.15.250 192.168.16.250 192.168.11.250 192.168.12.250 192.168.13.250 192.168.14.250

BACnet Network

no.

NET100 NET100 NET01 NET02 NET03 NET04

UDP Port BAC0 BAC0 BAC0 BAC0 BAC0 BAC0

IP segment 05 06 01 02 03 04

BBMD true true true true true true

BDT

IP address 192.168.15.250 192.168.16.1 192.168.11.250 192.168.12.250 192.168.13.250 192.168.14.250

192.168.11.250 192.168.15.250 192.168.15.250 192.168.15.250 192.168.15.250 192.168.15.250

192.168.12.250 - - - - -