ABB i-bus KNX Product Manual page 89

ABB i-bus® KNX FUNCTION
The Via duration of slat adjustment (step) method defines the duration and number of slat adjustments
to move the slats from fully closed to fully open. The maximum number of slat adjustments is used to
determine the current position of the slats during operation. The maximum number of slat adjustments
must be counted by the commissioner and entered in the parameter Number of slat adjustments (from
0 % = open to 100 % = closed).
The Via total duration for slat turning method involves first determining the time required to move the
slats from fully closed to fully open. Then, the desired number of slat adjustments (steps) is entered,
with which the slats are to be adjusted from fully closed to fully open. The device uses the adjustment
time and the steps to calculate the time for slat adjustment.
4.1.10.4 Travel range limit
The parameter Limit travel range via group object can be used to set a travel range limit for the output.
The Move blind/shutter Up-Down limited option is used to enable the group object Move blind/shutter
Up-Down limited , which permits the blind/shutter to be moved only in a limited range.
The Enable limitation option is used to enable the group object Enable limitation via which the limita-
tion is activated and deactivated. In addition to limitation of the travel range, it is possible to specify
whether upper and lower limitation is to be executed for direct telegrams and/or for automatic tele-
grams.
The parameters Upper limit (0 % = top; 100 % = bottom) and Lower limit (0 % = top; 100 % = bottom)
can be used to define the travel range for the blind/shutter.
Direct telegrams can be sent and received on the following central group objects:
• Move blind/shutter Up-Down
• Slat adjustment/stop Up-Down
• Move to position height
• Move to position slat
• Scene 1 ... 64
Direct telegrams can be sent and received on the following output group objects:
• Move blind/shutter Up-Down
• Stop Up-Down
• Slat adjustment/stop Up-Down
• Move to position height
• Move to position slat
• Scene 1 ... 64
Automatic telegrams can be sent and received on the following output group objects:
• Sun: Move to height
• Sun: Move slat
Example:
The travel range limit can be used to activate windows or skylights as well. The travel range for local
operation by the room users is limited to 0 ... 20 %, whereas the complete range is available to the jan-
itor.
4.1.10.5 Dead times
With sun protection systems, blind/shutter aging processes such as mechanical loads can lead to dead
times in the blind/shutter mechanism. These dead times can prevent the set positions from being
reached precisely.
Product manual | SAH/S x.x.7.1 | 2CDC505173D0211 Rev. A 89