User Manual

BACnet/IP networks
Checklist for designing BACnet/IP networks
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Question Designing the BACnet network Designing the IP network
For more than 500 BACnet references,
i.e. more than 50 scheduler programs
with a maximum each of 5 references
and 250 BACnet references to the
Desigo room automation stations,
requires an additional PXC.
Recommendation:
We recommend, when managing the
project with BOS, using a monitoring
device for scheduling or checking
whether the scheduler program for the
floor scope can be implemented using
another PXC.
Moreover, an additional PXC00-E.D is
preferable for monitoring Desigo room
automation stations.
Reason: All references, etc., are deleted
if BOS checks out a monitoring device
and scheduler without Desigo room
automation stations and the CFC data is
generated from the XWP Point
Configurator.
Should the IP network be redesigned and
implemented?
Definition of subnetwork and IP
addresses
Can the existing infrastructure be extended? Clarify with IT
Are equipment rooms, control panels,
distributors distributed over multiple floors?
Use of unmanaged layer 2 switches
What is the distance between control panels? Copper cable or glass fiber optics, clarify
the distances
Is network diagnostics and troubleshooting
required?
Managed layer 2 switches including
configuration for port mirroring
Is reliability and redundancy required? Managed layer 2 switches, RSTP
Is monitoring for faults/failures required? SNMP or hardware contact
Is remote access required? Use of security modules for firewall and
VPN
Is IT security required? Based on local and industry guidelines
Mid-sized project
Consider the following questions for detailed planning when designing a mid-sized project with a medium
level of network complexity:
Question Designing the BACnet network Designing the IP network
Is the number of Desigo room automation
stations between 500 and 2500?
Medium to large project and network of
medium complexity
Does the number of primary plants,
implemented with Desigo PXC, > 200?
Are BACnet third-party devices used? Own BACnet network
Does data exchange need to be implemented
between BACnet third-party devices and Desigo
units (PXC)?
Same UDP port Mounting managed layer 2 switches,
configuration of VLAN, and eventually
port mirroring
Are equipment rooms, control panels,
distributors distributed over multiple building
sections or floors?
Mounting BBMD
Are the units to control the primary plants
centrally located in an equipment room?
Plant scope
The same UDP port for the Desigo
system
Plant scope on its own VLAN