Colour temperature control block

This control element sets the brightness and the colour of a light – from warm, yellowish to cold, bluish light. On request the automatic mode adjusts both by itself over the day, just as daylight changes.

Operation

The tile shows brightness and colour temperature. The symbol at the top tells whether the automatic mode is running: Play means the day curve controls the light, Pause means it is operated by hand.

Important: The switch Auto on the tile does not switch the light but the automatic mode on and off. A tap on the rest of the tile opens the dialog. If a red W flashes, the configured operating time has been reached and maintenance is due.

The dialog

Symbols of the title bar: clock, presence, settings and – as the fourth – the table of the colour light control.
Ring: dragging sets the brightness. A tap on the centre toggles between 0 % and 100 %, + and – change it by 1 % each.
Colour temperature: the vertical slider, upwards colder, downwards warmer. The value in kelvin is shown above it.
Automatic mode: the button with play or pause switches the automatic mode on and off. The operating hours are shown to the left of it.
Favourite values: a tap recalls brightness and colour temperature. To assign a new value, first set both and then hold the button for 2 seconds. A button can only be reassigned if the element is linked to a function block.

Note: While the automatic mode is running, the day curve overwrites values set by hand at the next minute at the latest. Switch the automatic mode off first if you want to set values by hand.

The day curve

The colour light control imitates how daylight changes: warm, dimmed light in the early morning, bright and cool light around noon, warm and dimmed again towards the evening. Cool, bluish light has an activating effect, warm light a calming one. Anybody who spends a lot of time in rooms without daylight gets a light pattern similar to the natural one – in building technology this is also called “Human Centric Lighting”.

The colour temperature is given in kelvin: small values (about 2000 K) give warm, reddish light, large values (about 8000 K) cold, bluish light.

The fourth symbol of the title bar opens the table. It has one row for every full hour and is longer than the screen – it is moved by dragging.

Brightness (0 to 100 %) and Kelvin (0 to 10000 K) per hour. A tap on the value opens the input. Between two hours the controller calculates linearly and updates every minute – with 3000 K at 6:00 and 4000 K at 7:00 the light shines with 3500 K at 6:30. 23:00 is followed by 00:00 again, the curve runs through midnight. A row with 0 % switches the light off during that time.
Arrow down: copies the values into the row below – that way a value can quickly be kept the same over several hours.
K.1 / K.2: load a prepared curve after a confirmation. K.1 starts warm and dimmed at 6:00, reaches the highest and coldest value at noon and falls again until 18:00; at night the light stays off. K.2 covers all 24 hours and keeps the light on dimly at night as well. Both are meant as a starting point.

Only Save transfers the table to the controller; it is kept there even after a restart.

Switching times and presence

With this element timer and presence switch the automatic mode – they do not set a brightness or a colour, those come from the table. For every switching time Active or Inactive is chosen as the value, for instance switching the automatic mode on at 6 in the morning. Likewise it is set for each presence state whether the automatic mode is switched on or off on the change, on request only when it is dark. Everything else about switching times and presence is described under Presence.

Settings

The gear opens the same settings as with the Light/dimmer block: the thresholds for brightness, the presence simulation and the switch-on time with the maintenance indicator.

Setup

This section is meant for the installer of the system.

A light is required whose brightness and colour temperature can be controlled separately – usually a “Tunable White” ballast. Its range is stated in the data sheet.

The control element is linked to the function block Block colour temperature control (right mouse button on the control element); the variables sit at the function block. The values calculated from the day curve go to its outputs Percentage and Colour temperature K – the same ones that are written when operating by hand. It only calculates while the input Automatic is not equal to 0; at 0 the colour light control leaves the outputs alone. Besides tile, dialog, timer and presence, any other place in the program can write to this input. See also Presence.

Parameters

Display
Scene selection	Sets whether the element is offered for selection in the control element Block Scene Group.
View	Block or Basic screen.
Text	Caption of the tile. Its size scales with the element, a line break is inserted with \n, two lines at most.
Kelvin min. / Kelvin max.	Range of the colour temperature slider in the dialog, default 0 to 10000 K. Enter the range of the light here. The values of the table are not limited by it – make sure only colour temperatures the light can display are entered there.
Switching in basic screen	Only visible with the view basic screen. If ticked, a short tap switches the light on or off, holding it for 0.7 seconds opens the dialog. Without the tick every tap opens the dialog.

Variable links

All variables sit at the function block.