Switching status and brightness value

The gateway can track the current switching state and brightness value of a group or single device by means of separate status objects and also transmit them to the KNX, provided the bus voltage is switched on. The following status objects can be enabled independently of each other for each group and each configured single device...
– Switching status feedback (1-bit),
- Feedback brightness value (1-byte).

The gateway calculates the object value of the status objects during each switching or dimming process. The gateway tracks the switching state or brightness value and updates the status objects, even if a group or single device is activated by the manual operation or scene function.

The switching status object is updated during the following events...

  • immediately after switch-on, (if necessary, only after a switch-on delay has elapsed and at the beginning of a soft ON dimming process / also in the event of a staircase function),
  • after switch-off, (if necessary, only after a switch-off delay has elapsed and at the end of a soft OFF dimming process / also in the event of a staircase function),
  • immediately after switching off by means of the automatic switch-off function,
  • at the beginning of a dimming process when dimming ON (relative dimming up or brightness value = 1…100%),
  • at the end of a dimming procedure when dimming OFF (brightness value = 0 %),
  • if the switching state changes in normal operation (therefore not in the event of a dimming process without changing the switching state e. g. from 10% to50 % brightness),
  • at the start or end of a disabling or forced position function (if the switching state changes as a result),
  • at the beginning of a scene recall (whenever the switching state is consequently changed),

The brightness value status object is updated in the event of the following events...

  • at the end of a relative (4-bit) or absolute (1-byte) dimming process,
  • after switch-on, if the switch-on brightness is set (if necessary, first only a switch-on delay has elapsed and at the end of a soft ON dimming process / also in the event of a staircase function),
  • after switch-off, (if necessary, only after a switch-off delay has elapsed and at the end of a soft OFF dimming process / also in the event of a staircase function),
  • immediately after switching off by means of the automatic switch-off function,
  • if, in normal operation, the brightness value changes (if a brightness value specification exceeds/undershoots the maximum/minimum brightness as a result of relative or absolute dimming from outside or exceeds the maximum brightness, the gateway updates brightness value feedback according to the maximum brightness or minimum brightness),
  • at the start or end of a disabling or forced position function (if the brightness value changes as a result),
  • at the beginning of a scene recall (if this changes the brightness value),

If the bus/mains voltage returns or after an ETS programming operation, the status objects are initially initialised with the value "0". After the device initialisation (indication "--" on the display), the gateway evaluates the parameters for the reset behaviour and sets the state of the groups and single devices accordingly. If the reset behaviour is set to "no reaction", the switching and brightness value status only correspond to the actual state if the group or single device has been controlled at least once via the KNX or by manual operation.

In the case of disabling function as supplementary function: A flashing group or single device is always signalled back as "switched on" and with switch-on brightness. The switching status is transmitted also for disabled groups or devices if the group or single device is adjusted, for example, by a manual operation.

Activating the switching status

The switching status is implemented as an active signalling object so that the object value is also transmitted directly to the KNX during 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 switching status object is deleted, the object can be used as a passive status object.

The "Switching status" parameter is available separately 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 "Switching -Status" is enabled. The switching status is transmitted once the status is updated.
  1. Deactivate the parameter.
  • No switching status is available.

Activating the brightness value status

The brightness value status is implemented as an active signalling object so that the object value is also transmitted 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 brightness value status object is deleted, the object can be used as a passive status object.

The "Brightness value" parameter is available separately 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 "Brightness value - Status" is enabled. The brightness value status is transmitted as soon as the status is updated.
  1. Deactivate the parameter.
  • No brightness value status is available.

Setting the updating of the switching status

In the ETS, it can be defined when the gateway updates the feedback value for the switching 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 switching status must be enabled.
  1. Set the parameter to "after each update object 'Switching'/'Central switching'".
  • The gateway updates the feedback value in the object once a new telegram is received on the input objects "Switching - Setting" or "Central function... - Switching" for groups or single devices are updated. A new telegram is also then actively transmitted to the KNX each time. The telegram value does not necessarily have to change. Consequently, in the event of, for example, cyclical telegrams to the input objects, the corresponding switching status telegrams are also generated.
  • With other functions of the gateway (e.g. at the beginning or end of a disabling or forced position function or in the event of a manual operation or scene recall), no status is sent in this setting if the switching status does not change.
  1. Set the parameter to "Only if the feedback value changes".
  • The gateway updates the switching status only if the telegram value (e.g. "OFF" to "ON") 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 "Switching - Setting" and "Switching - 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 the update of the brightness value status

In the ETS, it can be defined when the gateway updates the feedback value for the brightness value 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 brightness value status must be enabled.
  1. Set the parameter to "after each update 'Brightness value'/'Central brightness value' object".
  • The gateway updates the feedback value in the object as soon as a new telegram is received at the input objects "Brightness value - Setting" or "Central function... - Brightness value". A new telegram is also then actively transmitted to the KNX each time. The telegram value does not necessarily have to change. Consequently, the corresponding brightness value status telegrams are also generated, for example, in the event of cyclical telegrams to the input objects.
  • With other functions of the gateway (e.g. at the beginning or end of a disabling or forced position function or in the event of a manual operation or scene recall), no status is sent in this setting if the brightness value status does not change.
  1. Set the parameter to "Only if the feedback value changes".
  • The gateway updates the brightness value status 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.
  • This setting is recommended, for instance, if the objects "Brightness value - Setting" and "Brightness value - 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).