"DALI Gateway C00CX2 EN / C00CX4 EN" software
Functional description
Best. Nr. 1060 00
Page 31 of 136
The communication via the DALI Gateway between the KNX/EIB and the DALI interface is bi-
directional. On the one hand, the Gateway receives telegrams from the KNX/EIB that either directly
influence the brightness status of a DALI group (e.g. by switching, dimming, setting the brightness
value or scene recall) or indirectly adjust it (e.g. via time, disable or forced-control position functions).
Thus, the DALI Gateway internally always detects the current brightness states of the groups and
forwards brightness commands to the DALI devices which will then adjust to the corresponding
brightness.
On the other hand, the internally tracked switching or brightness states of the groups can be reported
back to the KNX/EIB. The transmission of status information of the DALI devices (lamp error, electronic
ballast error) or the Gateway (mains voltage failure, DALI short-circuit) to the bus is possible.
In addition, all groups controllable by up to 32 KNX/EIBs can be integrated in 16 independent scenes.
In a scene, brightness values can be separately parameterized for each DALI group in the ETS. They
can also be adjusted any time later during the on-going operation.
If the DALI devices have been assigned several groups (overlapping groups) and if these groups
have been assigned a common scene, the devices will adjust to the brightness value of the group
with the highest number.
Example: An electronic ballast device has been assigned groups 1 and 2. Both groups have been
assigned scene 1. When recalling a scene, group 1 is to adjust to a brightness of 10 % and group 2
to 20 %. If scene 1 is recalled the electronic ballast device is adjusted to 20 % brightness since
group 2 has the higher group number.