The Automatic Blinds function block is used to control shading devices such as blinds, roller shutters, curtains or awnings.
In addition to manual operation, shading can be automated, based on sunlight and room temperature, in combination with Intelligent Room Controller.
The goal is to avoid overheating of a room due to solar radiation.
Table of Contents
- Type of shading device
- Parameters D, DT and DTe
- Parameters AT1 and AT2
- Deadband time Tot and Tdt
- Programming example
- Functional description
- Complete movement, end positions and remanence
- Function for setting the end limits
- Slat adjustment
|Tr||Trigger||Trigger for single button control||-||-|
|Up||Blinds up||Blinds UP||-||-|
|Dw||Blinds Down||Blinds DOWN||-||-|
|Cu||Fully up||Blinds fully UP||-||-|
|Cd||Fully down||Blinds fully DOWN||-||-|
Completely close Blinds (using closing duration Td) then drive in opposite direction (using duration Tr) to put slats in a horizontal position.
Roller blinds, awnings, and curtains go directly to the shading position defined by the parameter value Tr
|AS||Automatic shading||A permanent ON signal at the start of the shading period or a pulse/permanent ON during the shading period activates automatic shading.
If the blinds are operated manually while automatic shading is active (e.g. button press or via App), automatic shading will be deactivated for that day.
If the option "use sunshine" is enabled, the sunshine status (system variable) is taken into account.
|AD||Disable Automatic Shading||Automatic shading not allowed when ON||-||-|
|AR||Re-active automatic shading||Trigger re-activate automatic shading||-||-|
|Sp||Safety shutdown||Safety shutdown when ON
for example for storm protection
Move to safety position set by parameter SO and lock blind controls. Automatic shading will not be disabled.
|Id||Door contact||Complete up movement and lock function block. Operation via App is still possible.||-||-|
Stops the blind and blocks any further operation (also applies to safety shutdown)
|AIp||Position of blinds||Analogue input position of the blinds||%||0...100|
|AIl||Position of slats||Analogue Input - Value for the position of the slats in % This input is only visible in certain configurations.||%||0...100|
|T5||Combined Touch Input||Complete UP or DOWN.||-||∞|
|Dis||Disable||Disables inputs (Up, Dw, Cu, Cd, S, T5, Tr) (child lock)||-||-|
|Q↑||Blinds UP This output is only visible in certain configurations.||-|
|Q↓||Blinds DOWN This output is only visible in certain configurations.||-|
|AQp||Analogue Output - Value indicating the position of the blinds (0 = top, 1.0 = bottom)||∞|
|AQl||Analogue Output - Value indicating the position of the slats (0 = horizontal, 1.0 = vertical) This output is only visible in certain configurations.||∞|
|Qa||Automatic shading status||-|
|Qs||Status of safety shutdown input Sp or door contact||-|
Lock is active as long as input St is ON
|AQpp||Analogue Output - Value indicating the command output:
This output can only be used with GEIGER SOLIDline Air devices.
Command * 1000000 + Blind position in % * 1000 + Slat position in °.
Command 0 = Stop, 1 = Blind position + Slat position, 2 = Only blind position, 3 = Only slat position. This output is only visible in certain configurations.
|Abbreviation||Summary||Description||Unit||Value Range||Default Value|
|T||Type||Type of shading device
0 = Venetian blinds
1 = Roller blinds
2 = Curtains opening to both sides
3 = Schlotterer Retrolux
4 = Curtain left
5 = Curtain right
6 = Awning
|SO||Safety shutdown position||0 = on safety shutdown completely open
1 = on safety shutdown completely close
|AX||State after automatic shading ends||State when automatic shading ends
0 = no action
1 = fully open
2 = fully close
3 = set slats horizontal
|Tc||Minimum input pulse duration [s] for a complete motion||Minimum duration of the input pulse (Up, Dw) to trigger complete up or down movement.
If you prefer a double-click, then set the value > Tu or Td. Value 0 always starts a complete movement.
|Tu||Duration [s] of the output pulse to induce a complete UP motion||Duration output pulse for a complete UP motion||s||0...∞||75|
|Td||Duration [s] of the output pulse to execute a complete DOWN||Parameter - Duration in [s] of the output pulse to induce a complete DOWN motion||s||0...∞||70|
|TI||Motor Lock Time||Duration of motor lock between direction changes||s||0...∞||0,5|
|Tdc||Double-click interval [s]||Parameter - Double click interval [s] on input (Up, Dw) to trigger completely opening or closing the blinds.
If you don't want to use a double click enter 0 in this field.
|Tr||Return duration [s] for shading with blinds and percentage of closure for shutters/curtains||Return time for shading (straight alignment of slats) or shading position for roller shutter/roller blind/awning||s||0.1...∞||0,8|
|Tdt||Duration direction change||Deadband time for direction change. (Adjusting the slats) This parameter is only visible in certain configurations.||s||0...∞||0,15|
|Tot||Deadband time||Deadband time when driving in the same direction. Important for automatic slat adjustment in automatic mode. You can find this value in the motor's data sheet. This parameter is only visible in certain configurations.||s||0...∞||0|
|M||Minimum travel time||Output pulse duration (travel time) with short key press||s||0...∞||0,4|
|D||Cardinal direction||Cardinal direction of the window (0 = north, 90 = east, 180 = south, 270 = west)
-1 = not configured
|DT||Orientation tolerance start||Direction tolerance for automatic shading when the sun enters the shading area||°||0...90||85|
|DTe||Orientation tolerance end||Direction tolerance for automatic shading when the sun exits the shading area||°||0...90||85|
|Lw||Slat width||Parameter - Slat width in mm This parameter is only visible in certain configurations.||mm||0...∞||70|
|Ls||Distance between slats||Parameter - Distance in mm between two horizontal slats This parameter is only visible in certain configurations.||mm||0...∞||60|
|Ma||Automatic Mode||Automatic shading mode
0 = Optimal brightness (no automatic shading if closed)
1 = Optimal cooling (no automatic shading if closed)
2 = Optimal brightness (as much light in the room as possible, but no direct sunlight)
3 = Optimal cooling (The Sun is blocked as much as possible to keep out the heat) This parameter is only visible in certain configurations.
|AT||Tracking interval||The tracking interval specifies how often the slats may adjust during active automatic shading based on the sun's position. This parameter is only visible in certain configurations.||min||0...180||60|
|AT1||Start time automatic shading||Start Time Shift of Automatic Shading relative to Sunrise.||min||-90...90||30|
|AT2||End time automatic shading||End Time Shift of Automatic Shading Relative to Sunset.||min||-90...90||-30|
|Use sunshine variable||Automatic shading is only activated if the system variable Sunshine and the input AS are active||-|
|Assigned device||Shading device that is linked to this block. Loxone shading actuators (Air and Tree) are supported.||-|
Type of shading device↑
The function block and the user interface adapt based on the following types:
0: Venetian blinds and external blinds
1: Roller shutters and roller blinds
2:Curtains on both sides
3: Schlotterer Retrolux (special slats prevent direct sunlight, which makes readjusting the slats unnecessary)
4: Curtain one-sided left
4: Curtain one-sided right
Parameters D, DT and DTe↑
D: Cardinal direction of the shading device relative to the geographical north. (0 = North, 90 = east, 180 = south, 270 = West)
DT: Direction tolerance when the sun enters the shading device. The directional tolerance is relative to the perpendicular angle of the shading device. Consider, for example, building protrusions. If your shading device is not affected, you can leave this at its default value of 85º.
DTe: Direction tolerance when the sun exits the shading device. The directional tolerance is relative to the perpendicular angle of the shading device. Consider, for example, building protrusions. If your shading device is not affected, you can leave this at its default value of 85º.
Parameters AT1 and AT2↑
With parameter AT1, automatic shading will be delayed by this number of minutes after sunrise.
This is relevant for windows that may not get the sun directly after sunrise.
With parameter AT2, automatic shading will be brought forward by this number of minutes before sunset.
This is relevant for windows that may be affected by the sun prior to sunset.
There are two possible applications for the two parameters:
Often the sun is obscured by other buildings, structures or trees after sunrise and before sunset. Here, the start or end time of the automatic shading can be adapted to accommodate for these.
Another possibility is to shift the times so that sunrise or sunset can be seen with the shading open.
Deadband time Tot and Tdt↑
The parameter Tot (Deadband time) is added to the calculated run time (Tr) when adjusting the slats, if the preceding run was in the same direction. The parameter only affects slat adjustment, as a change of direction is always necessary when automatic shading is activated. If the slat position is correct at the start of automatic shading, but becomes inaccurate over the course of the day, this parameter must be adjusted.
The parameter Tdt (Duration direction change) is added to the calculated run time (Tr) when adjusting the slats, if the preceding run was in the opposite direction. If the slat position is already incorrect at the start of automatic shading, the sum of Tr + Tdt is either too high (sun shines in between the slats) or too low (blind closed too far)
To set the slat position, the required percentage of Tr and the applicable deadband time (Tot, Tdt) are added. For windows facing east, there is only one change of direction, as the slats are opened more and more during the course of the day; for windows facing west, the blind changes direction when adjusting for the first time.
A Loxone Touch is connected to the T5 input, to operate the function block according to the Loxone switch standard.
The outputs Q↑ (up) and Q↓ (down) are connected to the outputs that control the shading device.
The parameters Tu (up) and Td (down) specify the run times.
The parameter T defines the type of shading device.
In addition, the cardinal direction is specified in parameter D, to ensure that automatic shading is only activated when the sun is actually shining on the window. The Intelligent Room Controller's shading output (Qs) is used for this purpose:
When using venetian blinds, the parameters for deadband time, return time Tr and the slat dimensions Lw and Ls must also be set for them to be controlled correctly.
When configured with the recommended settings, automatic shading is activated when the room controller enables it via input AS. If however, automatic shading is activated manually, e.g. via App, the signal from the room controller is not required.
Automatic shading begins when the sun reaches the shading area and ends when it passes.
During this time, the slats are adjusted according to the angle of the sun. At the end, the blinds move to the position specified with parameter AX.
Manual shading, independent of the sun's position, can be triggered via input S or in the App with "Shading". The slats are then adjusted horizontally.
Automatic shading can be deactivated via input AD.
If the blinds are operated manually during automatic mode (e.g. using an app), then automatic shading is deactivated for that day. To reactivate the automatic control, a pulse on the AR input or activation via App is necessary.
|When automatic shading is activated, the blinds may not adjust immediately. Shading only starts based on the position of the sun and the related parameters.|
The functionality is illustrated in the following time diagram:
Output Qa indicates whether automatic shading is active.
To control multiple blinds simultaneously, the corresponding central function block is used.
Additional inputs, outputs and parameters may be required if standard push buttons are used or additional logic is programmed.
Complete movement, end positions and remanence↑
When fully opening the blinds (via Cu, central function block or the App), they are always activated for the entire UP duration, regardless of the current position. This ensures that the blinds move into the defined end position. This is equivalent to a reference run.
However, for safety reasons, when fully closing the blinds, they are only activated for the determined remaining run time.
The actual position of the blinds is stored in the Miniserver using the block's remanence function.
If e.g. the blinds are moving up and a power failure occurs immediately thereafter, the new position can not be registered by the Miniserver. When power returns, the system will remember the previous position of the blinds, although they are actually raised.
If a downwards movement is then triggered, it will not be executed at all or not far enough, because the previous position is still stored. Also the status displayed in the App will not match the actual position.
In such and similar cases, a complete upward movement must first be executed, then the shading will again operate as expected.
Function for setting the end limits↑
Since Loxone Config version 12.1, shading technology specialists have had a function available in the visualisation of the block for setting the end positions of the shading.
This function is comparable to commercially available setting cables, and requires precise knowledge and observance of the operating instructions of the respective motor.
In the open visualisation of the block, the function can be called up in the menu. For users with full access, the function is then accessible after entering the password:
When automatic shading is active, the blind slats are adjusted based on the sun's position.
The slats are tilted to an angle that prevents any direct sunlight from entering in between them.
Generally, the adjustment is carried out at the intervals set with parameter AT, but only at 15° increments, and only if necessary.
If, for example, the sun's path is at a relatively constant angle, its elevation will hardly change. For this reason, an adjustment is not necessarily carried out at every interval.
When the sun is rising, the value required at each interval is calculated and the slats are adjusted if necessary.
When the sun is setting, the value required for the following interval is calculated at each interval and the slats are adjusted if necessary.