Color temperature

The gateway can track the set colour temperature of a DALI group and single device via a separate 2-byte status object according to DPT 7.600 and can also transmit it to the KNX, provided the bus voltage is switched on. In addition, the gateway can indicate whether an externally specified colour temperature is valid ("ON" object value) or invalid ("OFF" object value) by means of a separate 1-bit status object. An invalid colour temperature exists if the specified value violates the set limits of the minimum and maximum colour temperature.

The gateway determines the object value of the status objects each time the colour temperature is influenced. The gateway tracks the colour temperature value and updates the status objects even if a group or single device is controlled by the scene function or HCL matrices.

The status object "Colour temperature - Status" is updated in the event of the following events...

  • after a completed relative or absolute colour temperature dimming process. If the group or single device is switched off and a colour temperature dimming process is carried out, the gateway updates the colour temperature status only if the "Switch-on colour temperature" parameter is configured to the "Track" setting.
  • immediately after switching on a group or single device, but only if the colour temperature value differs from the last value fed back,
  • at the beginning of a scene recall (whenever this changes the colour temperature),
  • in the event of an ongoing HCL daytime colour temperature sequence, provided there are changes to the colour temperature.

If the bus/mains voltage returns or after an ETS programming operation, the colour temperature status object is initially initialised with the value "0". After the device initialisation (indication of "--" on the display), the gateway evaluates the parameters for the reset behaviour, sets the state of the groups and single devices accordingly and updates the status object.

If a colour temperature specification exceeds or undershoots the minimum or maximum colour temperature as a result of relative or absolute dimming specified externally, the gateway updates the status according to the minimum or maximum temperature.

The status object "Colour temperature invalid - Status" is updated during the following events...

  • when a new absolute colour temperature is specified (depending on the configured transmission behaviour),
  • always after a device reset (ETS programming operation, bus/mains voltage return), with the "valid colour temperature" status.

Activating the colour temperature status

The colour temperature status is implemented as an active signalling object so that the object value is transmitted also directly to the KNX with each update. The ETS automatically sets by default the communication flags of the status object required for proper functioning.

If the "Transmit" flag of the colour temperature status object is deleted, the object can be used as a passive status object.

The "Colour temperature" parameter is separately available for each group or single device on the parameter page "DALI system... -> Configuration groups -> [x] Group name -> Status" or "DALI system... -> Configuration single devices -> [x] Device name -> Status" if the enabling has taken place on the corresponding parameter page for the status.

  1. Activate the parameter.
  • The object "Colour temperature - Status" is enabled. The colour temperature status is transmitted as soon as the status is updated.
  1. Deactivate the parameter.
  • No colour temperature status is available.

Activating the status for an invalid colour temperature

The status for an invalid colour temperature is implemented as an active message object, so that the object value is transmitted also directly to the KNX with each update. The ETS automatically sets by default the communication flags of the status object required for proper functioning.

If the "Transmit" flag of the status object is deleted, the object can be used as a passive status object.

The "Invalid colour temperature" parameter is separately available for each group or single device on the parameter page "DALI system... -> Configuration groups -> [x] Group name -> Status" or "DALI system... -> Configuration single devices -> [x] Device name -> Status" if the enabling has taken place on the corresponding parameter page for the status.

  1. Activate the parameter.
  • The object "Colour temperature invalid - Status" is enabled. The status for an invalid colour temperature is transmitted as soon as the status is updated.
  1. Deactivate the parameter.
  • There is no status available for an invalid colour temperature.

Setting the colour temperature status update

In the ETS, it can be defined when the gateway updates the feedback value for the colour temperature status. The object value updated last by the gateway is then actively signalled to the KNX, provided the "Transmit" flag is set on the communication object.

The parameter "Updating of the object value" is separately available for each group or single device on the parameter page "DALI system... -> Configuration groups -> [x] Group name -> Status" or "DALI system... -> Configuration single devices -> [x] Device name -> Status".

  • The colour temperature status must be enabled.
  1. Set the parameter to "after each update of the input objects for absolute colour temperature control".
  • The gateway updates the feedback value in the object as soon as a new telegram for the specification of a colour temperature value is received or a value is specified by an internal function of the gateway (e. g. scene function, HCL matrices). The default colour temperature value does not necessarily have to change. Consequently, in the event of, for example, cyclical telegrams to the input objects, the corresponding colour temperature status telegrams are also generated.
  1. Set the parameter to "Only if the feedback value changes".
  • The gateway updates the colour temperature status only when the telegram value also changes. If the telegram value does not change (e.g. in the case of cyclical telegrams to the input objects with the same telegram value), the status then remains unchanged. Consequently, no telegram with the same content is output repeatedly either.
  • This setting is recommended, for instance, if the objects "Absolute colour temperature - Setting" and "Colour temperature -Status" are linked to an identical group address. This is often the case when activating by means of light scene push-button sensors (recall and storage function).

Setting an invalid colour temperature status update

In the ETS it can be defined when the gateway updates the feedback value for the status of an invalid colour temperature. The object value updated last by the gateway is then actively signalled to the KNX, provided the "Transmit" flag is set on the communication object.

The parameter "Updating of the object value" is separately available for each group or single device on the parameter page "DALI system... -> Configuration groups -> [x] Group name -> Status" or "DALI system... -> Configuration single devices -> [x] Device name -> Status".

  • The status of an invalid colour temperature must be enabled.
  1. Set the parameter to "after each update of the input objects for absolute colour temperature control".
  • The gateway updates the feedback value in the object as soon as a new telegram is received to specify a colour temperature value. The default colour temperature value does not necessarily have to change. Consequently, in the event of, for example, cyclical telegrams to the input objects, the corresponding status telegrams are also generated.
  1. Set the parameter to "Only if the feedback value changes".
  • The gateway updates the status of an invalid colour temperature only if the telegram value also changes. If the telegram value does not change (e.g. in the case of cyclical telegrams to the input objects with the same telegram value), the status then remains unchanged. Consequently, no telegram with the same content is output repeatedly either.