Topology

Diagram

Fixed configuration

The 'physical' aspects of KNX Virtual are fixed, which means that no areas, no lines, no segments and no devices can be added, moved or removed.

Topology = 4 segments

KNX Virtual v2.5 represents a KNX installation consisting out of 4 segments:

• 1 IP segment : represented as 'S1'
• 2 TP segments : represented as 'S2' and 'S3'
• 1 RF segment : represented as 'S4'

The 4 segments are concatenated as follows:

• S1 is connected to S2 via device D19, which is an IP/TP coupler (or short 'IP coupler')
• S2 is connected to S3 via device D5, which is a TP/TP coupler (or short 'TP coupler')
• S3 is connected to S4 via device D18, which is a TP/RF coupler (or short 'RF coupler')

Interface

KNX Virtual has one tunneling interface:

• Represented by device D20, which is an IP/TP interface (or short 'IP interface')
• D20 is hosted by device D19
• D20 is connected to segment S2
• D20 has a fixed individual address: 1.0.255

Since the individual address of the interface is fixed to 1.0.255:

• The area of the installation is fixed to 1
• The line address of any device connected to S2 is fixed to 1.0

Topology variants

3 possible topology variants can be configured:

(*) x > 0, y > 0 and z > 0

Notes:

• A segment coupler is always the 'lowest' coupler in regards of hierarchical order, this is the reason why S4 is not supported by ETS in variant 2  and why S3 + S4 are not supported by in ETS in variant 3
  
  • For both projects the password is:

    a

• The ETS projects for variant 2 ('D5_segment_coupler') and variant 3 ('D19_segment_coupler') are attached to this article, an example project for variant 1 can be found here