User Manual

BACnet/IP networks
BACnet referencing over different IP networks
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4.3 BACnet referencing over different IP networks
A common exception is the necessity to provide an individual data point to multiple locations in the
building. One example is a weather station where the value is required on all BACnet networks. A coupling
of BACnet networks via BBMDs for just this one data point is possible, but costly.
As a consequence, Desigo V6.1 was extended with the functionality of BACnet referencing to connect
point-to-point between different IP networks / UDP ports.
No BBMD configuration is required for this functionality since it is a point-to-point connection (Unicast).
The following topology is thus also supported:
1. Desigo PX has read and write access to only one Desigo PX on another IP network (also on another
UDP port).
2. Desigo PX has read only access to only one Desigo room automation station on another IP network.
Restriction
In Desigo V6.1, the PXC3/DXR2 Desigo room automation stations cannot read data points from other IP
networks.
Syntax
B=[BACnet Network number (0=own network), Communication path (IP)"Station Address"]
[Objecttype,Object ID]{Property ID}
Example: B=[0,IP,"10.170.3.11:0xBACF"][0,63]{85}
For details, see
Appendix C in Ethernet, TCP/IP, MS/TP and BACnet (CM10666).
Desigo Room Automation
PXC3/DXR2
Desigo PX Desigo PX
Extended Syntax
B = [0,IP, "10.170.3.11:0xBACF"] [0,63]{85} AND command
10.170.3.11
A1 with Object ID 63
10.170.3.12
A1 with Object ID 63
B = [0,IP, "10.170.3.12:0xBACF"] [0,63]{85}
For Desigo Room Automation:
BACnet
IP Router
1.
2.
IP Network 1. BAC0
IP Network 2. BACF
Read and commend
Read only