23
ABB i-bus
®
KNX
Project design and programming
4.2.1
DALI output (Channel X)
communication objects
The general communication objects which are available for each DALI out-
put are described in the following section. Many communication objects are
dynamic and are only visible if the corresponding parameters are activated
in the application software. These communication objects are not visible
when starting the project design of the DALI Gateway. In the following
description, Channel X represents a DALI output (channel) between A and H.
The same communication objects are available for all other channels.
Fig. 10: Communication objects “Channel X”
No.
Function
Object name
Data type
Flags
0
On / Off
Channel A
1 bit (EIS 1)
DPT 1.001
C, W
Channel X On / Off [EIS 1; 1-bit switching]:
The DALI devices of the channel are switched
on or off via this object according to the predefined brightness values (parameter window
Channel X
).
Telegram value
“1”: On
“0”:
Off
On receipt of an ON telegram, the parameter settings determine whether a predefined
brightness value is set or the value that was selected before the channel was switched off.
If the channel is switched on with any brightness value and receives an ON telegram “1”,
the parameterised brightness value is set as the starting value.
Starting values which lie above or below the maximum or minimum value are not set.
The parameterised minimum or maximum value is set instead. It can be set via parameters
whether to dim or jump to the brightness value.
1
Relative Dimming
Channel A
4 bit (EIS 2)
DPT 3.007
C, W
Channel X Relative Dimming [EIS 2; 4-bit dimming]:
The relative dimming telegram for the
corresponding channel is received via this object. On receipt of a starting command,
the brightness is modified in the given direction and at the parameterised speed. If a stop
command should be received before the end of the dimming process, the dimming process
is interrupted and the achieved brightness value is retained.
Dimming values which lie above or below the predefined maximum or minimum value are not
set. The parameterised maximum or minimum value is retained for further dimming.
Table 4: Communication objects “Channel X”