Parameters for brightness

DALI System... -> Configuration groups -> [x] Group name

DALI System... -> Configuration of single devices -> [x] Device name

Minimum brightness	1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 15%, 20%...50%...100%
The settable brightness range of a group or single device can be limited by defining a lower and upper brightness value. This parameter defines the lower brightness value, which is not undercut in any operating state of the gateway. In this way, the lower brightness of the controlled lamps of the DALI operating devices can be limited individually and adapted to the respective application. The set brightness is not undershot when predefining a brightness value or during a dimming process in the "ON" state. The configured minimum brightness can be undershot during the dimming process only by switching off or when dimming up starting in the "OFF" state. The configured minimum brightness must be less than the maximum brightness.

Minimum brightness

1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 15%, 20%...50%...100%

The settable brightness range of a group or single device can be limited by defining a lower and upper brightness value. This parameter defines the lower brightness value, which is not undercut in any operating state of the gateway. In this way, the lower brightness of the controlled lamps of the DALI operating devices can be limited individually and adapted to the respective application.

The set brightness is not undershot when predefining a brightness value or during a dimming process in the "ON" state. The configured minimum brightness can be undershot during the dimming process only by switching off or when dimming up starting in the "OFF" state.

The configured minimum brightness must be less than the maximum brightness.

Maximum brightness	1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 15%, 20%...50%...100%
The settable brightness range of a group or single device can be limited by defining a lower and upper brightness value. This parameter sets the upper brightness value, which is not exceeded in any operating state of the gateway. In this way, the lower brightness of the controlled lamps of the DALI operating devices can be limited individually and adapted to the respective application. The configured maximum brightness must be greater than the minimum brightness.

Maximum brightness

1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 15%, 20%...50%...100%

The settable brightness range of a group or single device can be limited by defining a lower and upper brightness value. This parameter sets the upper brightness value, which is not exceeded in any operating state of the gateway. In this way, the lower brightness of the controlled lamps of the DALI operating devices can be limited individually and adapted to the respective application.

The configured maximum brightness must be greater than the minimum brightness.

Switch-on brightness	1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 15%, 20%...50%...100% Memory value (brightness like before the last switch-off)
At this point, the brightness value can be specified that is set when the device is switched on. Brightness value: The set brightness is set when receiving an ON telegram via the communication object "Switching - Setting" or when receiving a central telegram with the polarity "activated". Memory value (brightness as before switching off the last time): When switching on, the brightness value is set that was active and stored internally before switching off the last time. This memory value is stored in a non-volatile manner in the gateway so that the value is retained after the bus or mains voltage returns. After an ETS programming operation, the memory value is predefined to "100%". This value is optionally limited by the maximum brightness.

Switch-on brightness

1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 15%, 20%...50%...100%

Memory value (brightness like before the last switch-off)

At this point, the brightness value can be specified that is set when the device is switched on.

Brightness value: The set brightness is set when receiving an ON telegram via the communication object "Switching - Setting" or when receiving a central telegram with the polarity "activated".

Memory value (brightness as before switching off the last time): When switching on, the brightness value is set that was active and stored internally before switching off the last time. This memory value is stored in a non-volatile manner in the gateway so that the value is retained after the bus or mains voltage returns. After an ETS programming operation, the memory value is predefined to "100%". This value is optionally limited by the maximum brightness.

On receipt of a brightness value	jumping to dimming to Fading
This parameter defines the dimming behaviour for absolute dimming using the object "Colour temperature - Setting" for a group or single device. jumping to: As soon as a new brightness value is specified, it is instantly jumped to. Even if brightness values are instantly jumped to, the dimming procedure on DALI operating devices always takes a very short time as well as when switching without soft ON or soft OFF. This dimming procedure is dependent on the system. The brightness value jumped to is dimmed to within 0.7 s (short fading). This time cannot be altered. dimming to: As soon as a new brightness value is specified, it is set by means of the configured dimming increment time for absolute dimming. Fading: As soon as a new brightness value is specified, it is set by means of the configured fading time for absolute dimming. The dimming process then always takes exactly the set time, regardless of the initial value of the dimming process.

On receipt of a brightness value

jumping to

dimming to

Fading

This parameter defines the dimming behaviour for absolute dimming using the object "Colour temperature - Setting" for a group or single device.

jumping to: As soon as a new brightness value is specified, it is instantly jumped to. Even if brightness values are instantly jumped to, the dimming procedure on DALI operating devices always takes a very short time as well as when switching without soft ON or soft OFF. This dimming procedure is dependent on the system. The brightness value jumped to is dimmed to within 0.7 s (short fading). This time cannot be altered.

dimming to: As soon as a new brightness value is specified, it is set by means of the configured dimming increment time for absolute dimming.

Fading: As soon as a new brightness value is specified, it is set by means of the configured fading time for absolute dimming. The dimming process then always takes exactly the set time, regardless of the initial value of the dimming process.

Time between two dimming steps for absolute dimming	1...25...255 ms
Absolute dimming is triggered by specifying a brightness value. This value can be triggered by the 1-byte communication object "Brightness value - Setting" present in each group or single device according to KNX DPT 5.001 or - in the case of colour temperature control - additionally by the 6-byte combination object "Absolute dimming (brightness and colour temperature) - Setting" according to KNX DPT 249.600. The dimming speed for absolute dimming of the brightness can be configured here. The entire brightness range of 0...100% is divided into 255 dimming steps. The duration of a complete absolute dimming process within this brightness range is calculated with the formula: t = 255 x time between two dimming steps [ms]. The actual dimmable range is limited by the configured minimum and maximum brightness. This parameter is available only in the setting "On receipt of a brightness value = dimming to".

Time between two dimming steps for absolute dimming

1...25...255 ms

Absolute dimming is triggered by specifying a brightness value. This value can be triggered by the 1-byte communication object "Brightness value - Setting" present in each group or single device according to KNX DPT 5.001 or - in the case of colour temperature control - additionally by the 6-byte combination object "Absolute dimming (brightness and colour temperature) - Setting" according to KNX DPT 249.600.

The dimming speed for absolute dimming of the brightness can be configured here.

The entire brightness range of 0...100% is divided into 255 dimming steps. The duration of a complete absolute dimming process within this brightness range is calculated with the formula: t = 255 x time between two dimming steps [ms]. The actual dimmable range is limited by the configured minimum and maximum brightness.

This parameter is available only in the setting "On receipt of a brightness value = dimming to".

Time for colour temperature value via fading	0..20...240 s
Setting the fading time for absolute dimming. This parameter is available only in the setting "On receipt of a brightness value = fading".

Time for colour temperature value via fading

0..20...240 s

Setting the fading time for absolute dimming.

This parameter is available only in the setting "On receipt of a brightness value = fading".

Time between two dimming steps for relative dimming	1...25...255 ms
Relative dimming can be triggered either by the 4-bit communication object "Dimming - Setting" available for each group or single device, additionally - in the event of colour temperature control - by the 3-byte combination object "Relative dimming (brightness and colour temperature) - Setting" or by pressing and holding a button of the manual control. The dimming speed for relative dimming of the brightness can be configured here. The entire brightness range of 0...100% is divided into 255 dimming steps. The duration of a complete relative dimming process within this brightness range is calculated according to the formula: t = 255 x time between two dimming steps [ms]. The actual dimmable range is limited by the configured minimum and maximum brightness.

Time between two dimming steps for relative dimming

1...25...255 ms

Relative dimming can be triggered either by the 4-bit communication object "Dimming - Setting" available for each group or single device, additionally - in the event of colour temperature control - by the 3-byte combination object "Relative dimming (brightness and colour temperature) - Setting" or by pressing and holding a button of the manual control.

The dimming speed for relative dimming of the brightness can be configured here.

The entire brightness range of 0...100% is divided into 255 dimming steps. The duration of a complete relative dimming process within this brightness range is calculated according to the formula: t = 255 x time between two dimming steps [ms]. The actual dimmable range is limited by the configured minimum and maximum brightness.

With relative dimming up in the switched-off state	Switch on no reaction
A relative dimming telegram for controlling the brightness can also switch on a group or single device in the "OFF" state. Switch-on: The group or single device is switched on in the "OFF" state by a relative dimming telegram for the brightness and carries out the dimming process. After reaching the intended brightness, the dimming process stops. No reaction: The group or the single device in the "OFF" state is not switched on by the relative dimming telegram. The group or single device remains switched off.

With relative dimming up in the switched-off state

Switch on

no reaction

A relative dimming telegram for controlling the brightness can also switch on a group or single device in the "OFF" state.

Switch-on: The group or single device is switched on in the "OFF" state by a relative dimming telegram for the brightness and carries out the dimming process. After reaching the intended brightness, the dimming process stops.

No reaction: The group or the single device in the "OFF" state is not switched on by the relative dimming telegram. The group or single device remains switched off.

DALI System... -> Configuration groups -> [x] Group name -> Dimming characteristic

DALI System... -> Configuration single devices -> [x] Device name -> Dimming characteristic

Characteristic curve in the value range	Linear function Logarithmic function Combined function
Setting the characteristic curve in the value range allows the 256 dimming steps possible on KNX to be adapted to the perception of the human eye. If this parameter is changed, the curve of the characteristic curve is shown in the diagram below. The choice of characteristic curve depends on the controlled operating device and the connected lamp. Linear function: In this setting, the gateway linearises the DALI dimming characteristic curve by converting all brightness values received from the KNX and projected in the ETS, appropriately into DALI data values. Thus, the KNX brightness values form linearly on the luminous flux emitted by the DALI lamps. The gateway itself does not dim linearly in this setting. A linear dimming sequence of the relative luminous flux first results at the physical output of an operating device through the combination of the non-linear conversion of the gateway and the logarithmic characteristic of the operating devices. Status telegrams of the brightness value are also adjusted by conversion. On account of the internal calculation process, there may be slight deviations between the specified and fed back brightness value (e.g. specification = 50% -> Feedback = 49%). Logarithmic function: In this setting, the gateway forwards KNX brightness values unprocessed on the DALI page. A logarithmic dimming sequence of the relative luminous flux results at the physical output of an operating device through the combination of forwarding the value of the gateway and the logarithmic characteristic of the operating devices. KNX status telegrams of the effective DALI brightness value are possible in this case too. Combined function: This setting corresponds to a combination of linear and logarithmic dimming characteristic curve. The gateway converts KNX brightness values into suitable DALI dimming values, but not as intensively as with linearisation of the characteristic curve. The combination of a less severe value adjustment and the logarithmic dimming characteristic curve of the DALI operating devices results in a curved characteristic curve of the relative luminous flux at the physical output of an operating device with a less severe gradient especially in the upper dimming range. KNX status telegrams of the effective DALI brightness value are possible in this case too.

Characteristic curve in the value range

Linear function

Logarithmic function

Combined function

Setting the characteristic curve in the value range allows the 256 dimming steps possible on KNX to be adapted to the perception of the human eye. If this parameter is changed, the curve of the characteristic curve is shown in the diagram below. The choice of characteristic curve depends on the controlled operating device and the connected lamp.

Linear function: In this setting, the gateway linearises the DALI dimming characteristic curve by converting all brightness values received from the KNX and projected in the ETS, appropriately into DALI data values. Thus, the KNX brightness values form linearly on the luminous flux emitted by the DALI lamps. The gateway itself does not dim linearly in this setting. A linear dimming sequence of the relative luminous flux first results at the physical output of an operating device through the combination of the non-linear conversion of the gateway and the logarithmic characteristic of the operating devices. Status telegrams of the brightness value are also adjusted by conversion. On account of the internal calculation process, there may be slight deviations between the specified and fed back brightness value (e.g. specification = 50% -> Feedback = 49%).

Logarithmic function: In this setting, the gateway forwards KNX brightness values unprocessed on the DALI page. A logarithmic dimming sequence of the relative luminous flux results at the physical output of an operating device through the combination of forwarding the value of the gateway and the logarithmic characteristic of the operating devices. KNX status telegrams of the effective DALI brightness value are possible in this case too.

Combined function: This setting corresponds to a combination of linear and logarithmic dimming characteristic curve. The gateway converts KNX brightness values into suitable DALI dimming values, but not as intensively as with linearisation of the characteristic curve. The combination of a less severe value adjustment and the logarithmic dimming characteristic curve of the DALI operating devices results in a curved characteristic curve of the relative luminous flux at the physical output of an operating device with a less severe gradient especially in the upper dimming range. KNX status telegrams of the effective DALI brightness value are possible in this case too.