Automatic Blinds

This block is used for the advanced control of blinds such as internal or external Venetian blinds, roller shutters, roller blinds or awnings. ‘Advanced’ control means that this function block allows sun-optimised positioning of the blinds.

INTRODUCTION

The block has manual control as well as automatic control for fully optimised sun shading. The goal of the automatic function is to have maximum brightness in the room but avoiding direct sunlight.

When connected with the Intelligent room controller module you can cause the blinds to function as a result of the room temperature and sun position.

Don’t be put off by the number of inputs and parameters! Only a few are necessary for a basic setup.

BASIC SETUP

Loxone Standard for blind control is to use a Touch switch for the blind up and down functionality. By attaching a Touch switch to the T5 input, you immediately get control over the up and down functionality of your blinds. The top left and bottom left of your Touch switch will then drive the blind up for a set amount of time (can be set using parameter Tu) with a single press and then down a set amount of time (set by the Td parameter). Pressing either of the buttons whilst the blinds are in motion will stop them where they are.

Loxone-Standard-Blinds.jpg

 

Tu and Td are two important parameters that need to be set. Tu is the time it takes for the blind to go from completely down to completely up in seconds. Td is the stark opposite of that, the time it takes for the blinds to go from fully closed, to fully open. By default, Tu is 12 seconds and Td is 10.

Loxone-Standard-Blinds2.jpg

 

The blinds can now be operated using a Loxone Touch switch or the app.

No Touch switch?

If you don’t have a touch switch but still want to control your blinds through a switch? See the below section on Control Features for more information on how to do so!

COMBINING INTELLIGENT ROOM CONTROLLER WITH AUTOMATIC SHADING

You can link the Intelligent Room Controllers (IRC) to the Automatic Blinds block in order to provide cost effective passive cooling. That way, if the room is getting too hot, instead of turning on the AC units, the blinds will adjust to block out some of the sunlight so solar gain goes down, cooling the room.

In order to link the IRC to the automatic blind block, you will need to use a Central block. Some more information on Central blocks and what they do can be found here.

Central-block-blinds-to-heating.jpg

 

The image above shows how you would link an IRC to automatic blinds blocks through a central block. Any inputs that are ticked, will be listened to by the central block and it will forward information about shading to the automatic blind blocks, so they can adjust accordingly. Do be aware that the IRC may say: “we need shading” (as indicated by a 1 on the output Qs) but the blinds may not shade due to a few other factors (such as Sun positioning).

FURTHER AUTOMATIC SETTINGS

In addition to this basic setup, you can quickly enable some automatic shading by setting the parameter D. This is the compass direction of the window in degrees (as a bearing from north).

Then use the input AS to activate the automatic mode of the block. This is where you would connect the shading output from the Intelligent room controller so that when the room gets too hot the blinds close.

Finally, AD is the input you want to use to disable the automatic mode, for example in winter, or when a window is open.

Loxone_automatic_blind.jpg

 

TUBULAR MOTOR SOLIDLINE AIR

If you are using a SOLIDline Air tubular motor then the “Command Output” of the motor can be connected directly to the AQpp output of the function block.

This single connection communicates all the required information.

For setting up the SOLIDline Air please refer to the documentation here.

CONTROL FEATURES

The inputs Up and Dw partially open and close the blind. Using the parameters Tc and Tdc, the blind can be made to open or close completely if the respective button Up or Dw is double-clicked or held down. The inputs Cu and Cd trigger the blind to open or close completely. The blinds are controlled by the outputs Q↑ and Q↓. The blind’s opening or closing can be interrupted by a signal from the inputs Up, Dw, Cu or Cd.

The input S triggers maximum shading, i.e. lowers the blind completely then sets the slats to a horizontal position.

This function is only available if you have Venetian type blinds!

Another feature of this function block is the safety shutdown. This is triggered by a pulse at the input Sp – the parameter SO defines what the blinds do if the safety cut-off is triggered, for example in strong winds the blinds are driven completely up as Qs is set to 0 (SO off).

The stop input St halts the blinds. When St is activated, the blinds are locked in a stationary position and will not move.
Example: The stop input could be triggered by a door contact switch.

The Trigger Disable Dis input locks the Up, Dw, Cu and Cd inputs and any new input signal pulses are ignored. This could be used, for example, as a child lock.

Q↑ is the output for the blinds being raised and Q↓ is the output for the blinds being lowered.
The output AQp gives the current position of the blind and the output AQl gives the position of the slats.

These are calculated positions which may be incorrect when the blinds are used for the first time. If the position on the user interface is not the same as the actual position of the blind, then move the blinds into the corresponding position (fully up / down) until they match.

AUTOMATIC FUNCTIONS

This function block is designed to adjust blinds according to the position of the sun. The goal of the automation is to maximise brightness in the room while avoiding direct sunlight in order to stop the room overheating.

A pulse at the input AS activates the automation. You can lock the automatic functions using the input AD, which means that a pulse at AS will not start automatic mode. This could be used for example to change between summer and winter modes. The status (active/not active) of the automatic mode is shown at the output QA.

If the automatic shading is activated, that does not mean that the blinds will immediately start to move – the movement of the blinds also depend on the parameters D, DT and AT1 and the position of the sun.

The behavior of the blind’s operation can be taken from this time chart.

Automatic-jalousie.png

 

In order to make as little noise as possible, the automation is designed to minimise movement of the blinds. You can change the time between adjustments of the blind with the parameter AT. For example if AT is set to 30, then the position of the slats will be adjusted every 30 minutes.

Once automatic shading has finished (which depends on the parameters D, DTe and AT2), you can specify what the blinds should do- e.g. open completely. To do this, adjust the parameter AX.

AX = 0   No action
AX = 1   Completely open
AX = 2   Completely close
AX = 3   Set slats horizontal

If, whilst in automatic mode, the blinds are operated manually i.e. one of the inputs Up, Dw, Cu, Cd, Sp or St is triggered, automatic shading is turned off for that day – i.e. the blinds will no longer move automatically for the rest of the day. If you want to re-enable automatic shading for that day, then input AR must be triggered.

For further information on the parameters, please see the parameter descriptions.

Example Use: You could use automatic shading if the room temperature or level of sunlight went above a certain threshold.

The shading finishes when the sun leaves the shading area.
When automatically shading, the inputs Up, Dw, Cu, Cd, Sp, St or AD are not used.

Loxone_automatic_blind2.png
Loxone_automatic_blind3.png

OUTPUTS

Loxone_automatic_blind_output.png

 

PARAMETERS

PARAMETER T

Type of blind:

0 = Blinds or Venetian blinds
1 = Shutters, rollers or roof blinds
2 = Curtains
3 = Schlotterer Retrolux (the special lamellae prevent direct exposure to the sun which means that it is not necessary to adjust slats)
4 = Curtain
5 = Curtain left
6 = Curtain right
6 = Awning

PARAMETER SO

Position on safety shutdown:

0 = When a pulse occurs on input Sp the blinds drive all the way up
1 = When a pulse occurs on input Sp the blinds drive all the way down

This is useful with for external blind protection in high winds.

PARAMETERS AX

Action after the end of automatic shading:

0 = No action (remains in the position at the end of shading)
1 = Drive completely open
2 = Drive completely closed
3 = Set the slats horizontal

PARAMETER TIMES

Tc – Minimal time [s] of the input pulse (Up, Dw) to trigger complete opening or closing of the blinds. If you would rather use a double click enter a very high value in this field.
Tu – Duration in [s] of the output pulse to move the blinds fully open.
Td – Duration in [s] of the output pulse to move the blinds fully closed.
TI – Duration in [s] during which the motor is locked between direction changes, please check the blind manufacturer datasheet.
Tdc – Double click interval [s] on input (Up, Dw) to trigger complete opening or closing of the blinds. If you don’t want to use a double click enter a 0 in this field.
Tdt – Delay duration [s] for motor lock with a direction change (slat orientation).
Tot – Delay duration [s] for motor lock with no direction change (slat orientation).
M – Duration [s] of output pulse if using a short press on the inputs (for trimming the blind position).

PARAMETER TR

Loxone_Diagram_Slats.png
Loxone_automatic_blind_parameter.png

PARAMETERS D, DT AND DTE

Loxone_Diagram_D_DT_DTE.png
Loxone_automatic_blind_parametertr.png
Loxone_Diagram_Shading_LW_LS.png
Loxone_automatic_blind_parametertr1.png

PARAMETER MA

Automatic shading mode:

Ma = 0
Optimal brightness (no automatic shading when closed)
During the shading period, the slats are tilted to allow the maximum amount of light into the room, whilst preventing direct sunlight and thus also glare. In comparison to the optimal cooling mode the slats are at a shallower angle in this mode.
In this mode if the blinds are completely closed at the beginning of the shading period (as soon as AS is on), the blinds are not moved by the automatic shading function.

Ma = 1
Optimal cooling (no automatic shading when closed)
During the shading period, the slats are tilted to block the sunlight most efficiently and reduce the solar gain, e.g. heating up of the room due to the sun. This results in a darker room since the slats are at a steeper angle compared to the optimal brightness mode.

In this mode if the blinds are completely closed at the beginning of the shading period (as soon as AS is on), the blinds are not moved by the automatic shading function.

Ma = 2
Optimum brightness
During the shading period, the slats are tilted to allow the maximum amount of light into the room, whilst preventing direct sunlight and thus also glare. In comparison to the optimal cooling mode, the slats are at a shallower angle in this mode.

Ma = 3
Optimal cooling
During the shading period, the slats are tilted to block the sunlight most efficiently and reduce the solar gain, e.g. heating up of the room due to the sun. This results in a darker room since the slats are at a steeper angle compared to the optimal brightness mode.

PARAMETERS AT, AT1 AND AT2

Loxone_Diagram_Shading_AT_AT1_AT2.png
Loxone_automatic_blind_parametertr2.png