10. KNX Interface
10.1. Description
The KNX interface of the gateway connects directly to the KNX bus performing as one more device in the KNX
system. In this way, the gateway can receive, manage, and send all telegrams related to its configuration to the
KNX bus.
When the gateway receives write telegrams of KNX group addresses associated with internal datapoints, it sends
the corresponding messages to the internal system, keeping both systems synchronized at every moment.
When the gateway detects a change in a signal of the other side's protocol, it sends a write telegram to the KNX
bus (addressed with the group address associated with the corresponding group object), keeping both systems
synchronized at every moment.
Since the gateway continuously checks the KNX bus status, if a bus drop-down is detected, for example, due to a
failure in the bus power supply, once the KNX bus is restored, the gateway will send read telegrams to all group
objects marked with "Ri." The behavior of each point in the gateway is determined by the flags configured for the
point.
10.2. Points Definition
Every internal communication object has the following KNX properties:
Property
Description
Description
Descriptive information about the communication object or signal.
Signal
Signal description. Only for informative purposes (it facilitates the identification of the signal).
DPT
KNX data type used to code the signal value. It will depend on the type of signal associated with the external system in every
case. In some integrations, it is selectable while, in others, it is fixed due to the intrinsic characteristics of the signal.
Group
KNX group to which the point is associated. It is also the group to which the read (R), write (W), transmit (T), update (U), and
read on init (Ri) flags are applied. It is the sending group.
Additional
addresses
Addresses allowed to write on the group object, apart from the main group address.
R
Read. If this flag is activated, read telegrams of this group address will be accepted.
Ri
Read on Init. If this flag is activated, the object will trigger the corresponding read request (on the associated group address)
on initialization.
W
Write. If this flag is activated, write telegrams on this group object will be accepted.
T
Transmit. If this flag is activated, when the group object value changes due to a change in the external system, a write telegram
of the associated group address will be sent to the KNX bus.
U
Update. If this flag is activated, update telegrams (response to read telegrams) on this group object will be accepted.
Active
If activated, the point will be active in the Intesis gateway; if not, its behavior will be as if it was not defined. This property
allows deactivating points without deleting them, keeping them for future use if needed.
IN701-KNX Series
KNX Interface
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USER MANUAL Version 1.0
