Automatic Sun Protection - ABB i-bus KNX Product Manual

ABB i-bus® KNX FUNCTION
The following parameters are available to compensate for the dead times of the blinds/shutters and the
slats:
• Dead time blind/shutter from bottom until moving up
• Dead time of slat from 100 % closed until slat turn
• Slippage of slat on change of direction
• Slippage of blind/shutter on change of direction
Incorrect settings in the parameters can cause malfunctions. Pay attention to technical data for the
connected drive when changing these parameters.
4.1.10.6 Tensioning of the blind/shutter / slot positioning
This function is available only if, in the parameter Operating mode, the option Blind/shutter control
without slat adjustment is selected.
This function can be set in the parameter Tensioning of the blind/shutter / slot positioning. It is used to
tauten or tension textile blinds/shutters (e.g. sheet of an articulated arm awning) or to adjust the slot
position (e.g. light or ventilation slots) in slatted curtains. The blind/shutter is stopped at the end of a
downward movement and then moved in the opposite direction for the time set in the parameter Dura-
tion for tensioning.
If tensioning/slot positioning is active, it is triggered by the following movement telegrams:
• Direct telegrams (→ Direct operation, Page 91)
• Automatic telegrams (→ Automatic sun protection, Page 90)
• → Manual operation, Page 82
• → Safety functions of Shutter Actuator, Page 77
The movement telegrams must be present for longer than the set duration for tensioning/slot position-
ing.
The duration of tensioning/slot positioning must be shorter than the total travel time for the downward
movement.
The duration of tensioning/slot positioning influences the calculation of the blind/shutter position and
the status group objects. The current blind/shutter position value is reported back to the device after
tensioning/slot positioning.
In case of a movement telegram during tensioning/slot positioning, a position value that is reduced by
the duration of tensioning/slot positioning will be reported back.
Example:
Calculation of the position value:
- Total downward travel time: 60 s = 100 %
- Duration of movement telegram: 30 s = 50 %
- Duration of tensioning/slot positioning: 0,5 s = (100 % × 0.5 s / 60 s) = 0.8 %
--> Position value: 50 % - 0.8 % = 49.2 %
4.1.11

Automatic sun protection

The function Automatic sun protection can be used to implement fully automatic room shading solu-
tions depending on the incident sunlight.
Note
Note
Product manual | SAH/S x.x.7.1 | 2CDC505173D0211 Rev. A 90