Parameters for Colour Transition Mode (CTM)

Each matrix can be given a designation, which is visible only in the ETS for better identification.

Each CTM matrix contains settings for the hue (0°...360°) and brightness (0...100%) for each full hour of the daytime (0:00 midnight, 1:00 a.m., 2:00 a.m....11:00 p.m.). Depending on the time of day, the individual colour and brightness values are called up one after the other as the daytime colour sequence runs down. The values between two full hours are determined continuously every minute by linear interpolation to implement a smooth colour and brightness progression.

In a CTM matrix, the colour and brightness values are always configured for each time. Whether a group or single device reacts only to the pre-programmed colour or additionally to the defined brightness value is defined by the parameter "Type of daytime colour sequence" on the parameter pages of the groups and single devices.

The brightness values stored in a CTM matrix can always be configured within the range of 0...100%. If CTM brightness values are outside the brightness range defined by minimum and maximum brightness of assigned groups or single devices, the gateway limits the brightness to the specified limits when a daytime colour sequence is in progress.

During a daytime colour sequence, the values for colour saturation and brightness remain constant at the maximum value (100%). Only the hue is adjusted.

The parameters "brightness" and "hue" are available for each full hour of a CTM matrix. The default setting of the parameters depends on the time.

This parameter defines which of the up to four CTM matrices is initially effective for the affected group or single device after the gateway has been commissioned by the ETS or after a reset. Optionally, the matrix assignments can be switched by 1-byte objects during operation of the gateway.

After an ETS programming operation or mains voltage return, the configured CTM matrix is effective. However, it is executed only when a start takes place.

During operation of the gateway, the matrix assignments of groups and single devices can be switched over by 1-byte objects. This allows the pre-programmed daytime colour sequences to be switched over individually depending on the application.

Checkbox selected: The 1-byte communication object "Daytime colour sequence (CTM) - Switch matrix" is available. According to KNX DPT 17.001, a switchover can be performed by the number of the matrix (1...4) during operation of the gateway.

Checkbox deselected: No communication object is available for switching the CTM matrices during operation. The CTM matrix defined by the parameter "After ETS programming operation" always remains effective.

The two status objects for the day colour gradient (CTM) "Status" and "Active matrix" can be activated or deactivated with this parameter

Checkbox selected: The 1-byte communication object "Daytime colour sequence (CTM) - Active matrix" is available. In accordance with KNX DPT 17.001, the number of the matrix (1 ... 4) the currently active matrix is transferred.
The 1-bit communication object "Day colour gradient (CTM) - Status" shows the status of the day colour gradient ("1" = day colour gradient active, "0" = day colour gradient not active).

Checkbox deactivated: No communication object for the status of the day colour gradient (CTM) is displayed.

A daytime colour sequence can be executed with or alternatively without brightness adjustment. Whether a group or single device reacts only to the pre-programmed colour or additionally to the defined brightness value of the CTM matrix is defined by this parameter.

Only colour adjustment: In this case, the gateway only takes into account the colour value of the CTM matrix corresponding to the day of the week and the time. The brightness value stored in the matrix is ignored. The brightness can then be controlled by other functions of the gateway (e.g. by switching and dimming or by the automatic brightness sequence).

Colour and brightness adjustment: In addition to evaluating the configured colours of the CTM matrices, the gateway also evaluates the stored brightness values.

A daytime colour sequence is of the same priority as the normal control of the brightness and colour of a group or single device by the corresponding communication objects. An automatic colour wheel sequence, an automatic brightness sequence or a scene recall also has the same priority. The above functions override a daytime colour sequence in progress in terms of colour and brightness.

In the event of an override, a daytime colour sequence in progress can be stopped automatically, or alternatively continue to run in the background. The behaviour is defined by this parameter.

CTM continues to operate: An ongoing daytime colour sequence can be overridden at any time by other functions of the gateway. However, the daytime colour sequence continues to run, whereby the values stored in the CTM matrix continue to be called up continuously every minute, depending on the time. In this case, the last received or given commands for the colour or brightness of other functions (e.g. scene recall) are replaced by the CTM values again after one minute at the latest. For daytime colour gradients with brightness adjustment, the brightness values defined in the CTM matrix are tracked. The gateway then continues to process the interpolated brightness values every minute and, if necessary, switches on any operating devices that have been switched off. With daytime colour sequences without brightness adjustment, the colour is internally tracked by the CTM matrix even if groups or single devices are switched off. If a group or single device is switched on, the gateway sets the tracked colour so that DALI operating devices subsequently switched on display the correct values of the daytime colour sequence.

CTM is terminated: If a daytime colour sequence is automatically stopped by an override, the gateway immediately stops processing the assigned CTM matrix.

The Colour Transition Mode (CTM) implements colour gradients for the implementation of different colour moods depending on the time of day and day of the week. The individual colour and brightness values are called up in sequence, depending on the time. However, this is done only on selected weekdays. In the ETS configuration, it can be defined at this point on which days of a week a daily colour sequence is executed.

A started daytime colour sequence is executed only on the configured weekdays. The daytime colour sequence is paused on days of a week not included in the selection.