6. BACnet Server to KNX
6.1. Specific Introduction
This section describes the integration of KNX installations into BACnet MSTP or BACnet IP compatible devices and
systems using the BACnet server to KNX application of the Intesis gateway.
This integration allows a BACnet-based control system to access the signals and resources of KNX systems as if
they were part of the BACnet system itself and vice versa.
The gateway acts as a BACnet IP server or BACnet MSTP device in its BACnet interface, allowing other BACnet
devices to perform subscription (COV) requests and readings/writings to its internal points. From the KNX point
of view, the gateway emulates a KNX device.
The gateway configuration is carried out through the configuration tool.
Figure 3. Integration of KNX devices into BACnet IP or BACnet MS/TP control and monitoring systems
6.2. Functionality
From the KNX system point of view, after starting the gateway or performing a KNX bus reset, the Intesis gateway
polls the KNX signals and stores the received values in its memory, ready to be served to the BACnet system
when requested. It also listens for any KNX telegram related to the internal points configured in it and acts
accordingly to the configuration of the related points.
From the BACnet system point of view, after starting it, the gateway listens for any subscription (COV) request,
serves any polling request, or performs any writing request of its internal points received from the BACnet
system. The values received from BACnet are immediately written in the associated KNX communication object if
allowed by the KNX settings.
In the KNX part, one main group address and different listening group addresses can be defined for every point.
This way, every point can be addressed using its main group address and the other specified listening addresses.
Any change in a point in the gateway with the “T” flag activated (in the KNX part) will force the transmission of
this point value with the corresponding telegram to the KNX system.
Any point with the “W” flag activated (in the KNX part) can be written from the KNX system at any moment.
IN701-KNX Series
BACnet Server to KNX
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USER MANUAL Version 1.0
