Scene function

Luminaires or luminaire groups can optionally be integrated in up to 16 scenes, which means that pre-programmed static light scenes can be recalled by influencing the brightness, colour temperature or colour. If necessary, the scene values can be switched over and individually adapted and saved during operation of the device, allowing the user to replace the presettings of the ETS as desired. The extended scene recall allows scenes to be switched over by switching commands.

The scene function must be enabled separately on the parameter page "DALI system... -> Scenes" for a DALI system so that the required communication objects and parameters become available.

Each scene receives a unique number (1...16), which is shown in square brackets before the name in the view of the parameter pages. This number is only a label within the ETS in order to distinguish clearly between the individual scenes, even if they have the same name. In addition, scenes have KNX numbers (1...64). These KNX numbers can be used to recall a scene or a scene memory function using the scene extension object. Scene numbers do not have to be identical to KNX extension numbers. However, KNX numbers must be unique. It is not possible to assign the same KNX numbers to multiple scenes of a DALI system.

The scene configuration selected in the ETS decides whether the number of scenes is either variable (1...16) or alternatively fixed to the maximum (16).

• Scene configuration = "variable (1 ... 16 scenes)"
  With this setting, the number of scenes used can be selected anywhere in the range 1 to 16. The "Number of scenes" parameter decides how many scenes are available in the ETS for the selected DALI system. It is possible to specify which scene number (1 ... 64) controls each scene. If necessary, individual scenes can be switched to inactive by configuring the scene number "0".
• Scene configuration = "fixed (16 scenes)"
  With this setting, all scenes are always visible and can therefore be used. The scenes are controlled via permanently assigned scene numbers (1 ... 16) (scene number 1 -> scene 1, scene number 2 -> scene 2 ...). If necessary, individual scenes can be deactivated.

A scene recall overrides a brightness value specification and a switching or dimming process and also colour temperature or colour specifications by means of the respective communication objects. A staircase function is also overridden by a scene recall. The priority of the scene function over the disabling or forced position functions of a group or a single device can be configured for each scene. Thus, it is possible for a scene recall to override a disabling or forced position function. Alternatively, a scene can have a lower priority, which means that disabling functions or forced positions cannot be overridden by a scene recall. A function overridden by a scene recall is executed again when the function is updated via the KNX.
A scene recall can optionally take place after a delay.

Scenes are influenced by the global addressing type and by the general configuration of the groups and single devices. Therefore, the global and general parameters must be set first before the scene configuration takes place!

In a parameter table of a scene, the groups are always listed first, and then the single devices. If additional groups are subsequently added after the scene has been configured, please note that the newly added groups are inserted into the parameter table before any existing single devices. This gives the new groups the configuration of the previously existing single devices. In this case, the scene configuration must be checked and, if necessary, adjusted manually. This situation does not apply if no single devices are configured.

Configuring an extended scene recall

The extended scene recall allows up to 16 scenes of a DALI system to be called up in sequence. Here, scene recall takes place via the 1-bit communication object "Extended scene recall". Each ON telegram received via this object recalls the next of the available scenes in the configuration. Each OFF telegram received recalls the previous scene.

In the event of an extended scene recall, the gateway always recalls the neighbouring scene - starting with the scene most recently recalled by the extended recall. It is irrelevant whether the scene is active (scene number = "1...64" or scene active) or inactive (scene number = "0" or scene inactive). When an ineffective scene is recalled by the extended scene recall, the assigned group or single device does not react.

Only the scenes available in the scene configuration can be selected via the extended scene recall (with "variable" defined by the parameter "number of scenes", with "fixed" always all 16 scenes). After a reset (bus/mains voltage return, ETS programming operation), an ON or OFF telegram always recalls scene 1 first.

Recall of a scene via the 1-byte extension object does not influence the scene sequence of the extended scene recall. The two recall functions work independently of each other.

The extended scene recall can take place with or without an overflow at the scene limits. An overflow occurs when the last scene of the selected configuration is reached when counting up or scene 1 when counting down and an additional telegram is received in the last counting direction. The overflow behaviour is defined in the ETS.

Configuring the group and device assignment of a scene

Groups and single devices can be assigned to a scene without restrictions. Each group and each single device can be assigned independently by selecting the "Assignment" checkbox behind in the group or single device name in the parameter table of a scene. Any existing groups and single devices whose checkboxes are not activated are not assigned to the scene. All groups or single devices of the gateway that have not been created are not available in a scene table.

To make it easier to identify the available groups and single devices in the parameter table of a scene, the group and single device numbers are displayed in square brackets (groups [1]...[32] / single devices [1]...[64]), the type "group" or "single device" and the projected designation in the table. The designation can be individually adapted on the parameter pages for the configuration of the groups and single devices.

Special feature when using the ETS5: Due to a functional limitation, the ETS5 may display the type and designation of a group or single device in English.

Scenes can be used for a central control (broadcast). In this case, only one group can be configured as the central group in each scene.

Setting scene values

For each group integrated in a scene and for each integrated single device, it is necessary to specify which brightness value is to be set when a scene is recalled. When using colour temperature control, a colour temperature can also be defined for each assigned group or single device. The same applies to the colour control.

The configured scene values are then adopted in the gateway during an ETS programming operation only if the parameter "Overwrite values stored in the device during the ETS programming operation" is activated.

Recalling a scene also triggers status telegrams, provided they are configured. It should be noted that, even with long scene dimming sequences, the scene target values are transmitted as a status immediately after starting the dimming process, i. e. already when the target value has not yet been statically reached.

The selection of scene values is not limited in the ETS to the configured minimum and maximum values of the groups and single devices. If the scene values are outside the range defined by the minimum and maximum values, the gateway limits the values to the defined limits.

During DALI commissioning, it is possible to assign multiple identical DALI operating devices to different groups (multiple assignment: e.g. Electronic ballast 1 is located in Group A and Group B). If groups (e.g. A & B) have now been assigned to a scene and these groups contain the same operating devices (e.g. electronic ballast 1), there will be a conflict in the event of different scene values. In this case, the operating devices assigned multiple times are set to the values of the group with the highest number.

Presetting the storage behaviour for the scene function

The scene values of assigned groups and single devices can be stored internally in the device when a storage telegram is received by means of the scene extension object during the running time of the gateway. It is possible to influence the values to be saved by all functions of the individual groups and devices before saving them (e.g. switching, dimming, preset value, manual operation). The values are always saved for an entire scene and for all assigned groups and single devices, whereby it can be individually configured which brightness values, colour temperature values or colours are saved.

Whenever scene values are not active ("Active = deactivated" parameter), the storage function for the affected values cannot be executed. In the ETS, the "Save" parameter cannot be activated in the respective category.

During a saving operation, scene values are saved to an internal non-volatile memory in the gateway, thus overwriting the values of a group or single device programmed by the ETS. The scene values configured in the ETS are then adopted in the gateway during ETS programming again only if the parameter "Overwrite values stored in the device during the ETS programming operation" is activated.

Setting the scene priority

The priority of the scene function over the disabling or forced position functions of a group or single device can be configured for each scene. Thus, it is possible for a scene recall to override a disabling or forced position function. Alternatively, a scene can have a lower priority, which means that disabling functions or forced positions cannot be overridden by a scene recall.
The scene priority can be configured separately for each created scene.

Setting the ETS programming behaviour for the scene function

When storing a scene, the scene values are stored internally to a non-volatile memory in the device. To prevent the stored values from being replaced during ETS programming of the application or parameters by the originally programmed scene brightness values, the gateway can inhibit overwriting of the scene values. As an alternative, the original values can be reloaded into the device during each programming run of the ETS.
The ETS programming behaviour can be configured separately for each scene.

During the initial commissioning of the gateway, this parameter should be set to activated so that the scenes are initialised with valid scene values.

Presetting the recall delay for the scene function

Each scene recall can optionally also be evaluated after a delay. With this feature, dynamical scene sequences can, for example, be configured if several actuators or gateways are combined with cyclical scene telegrams.
The scene recall delay can be configured separately for each created scene.

Each scene recall telegram restarts the delay time and, in this way, retriggers it.

The scene recall delay has no influence on the storage of scene values. A scene storage telegram within a scene recall delay terminates the delay and thus the scene recall.

All time functions are stopped if the mains voltage supply to the gateway fails. Therefore, all scene recalls that are still in the delay stage will be aborted. A scene recall received shortly before a mains voltage failure will then be lost if the corresponding delay has not yet elapsed. A bus voltage failure alone does not stop an elapsing delay. If the mains voltage supply is still available, the last scene called up is executed at the end of the delay. A delayed scene recall is aborted for the affected groups or single devices also if a function of higher priority (e.g. manual operation, forced position function, disabling function) is activated.

Setting the dimming behaviour when recalling a scene

In the scene configuration, it is possible to define whether the scene values for the assigned groups or single devices jump instantly or dim. A scene recall can therefore be executed independently of the set dimming behaviour.
The behaviour during a scene recall can be configured separately for each scene.

All DALI operating devices included in the scene (through groups or as a single device) react simultaneously, because addressing takes place on the DALI side using scene commands (Multicast), which the gateway programs into the operating device during initialisation, depending on the scene configuration.

The configured dimming time for the dim fading of the scene function may deviate from the standard dimming behaviour of a group or a single device. The gateway always works with a standard fading time of 0.7 seconds. This value is automatically programmed into DALI operating devices during initialisation. Directly after scene recall, the gateway reprograms all the assigned DALI operating devices to the dimming time of the scene. After recalling the scene, the gateway immediately re-programs the fading time back to the original value.