Response after a device reset

The switching states or brightness values that set themselves after a bus voltage failure, bus or mains voltage return or after an ETS programming operation for DALI groups or single devices can be configured in the ETS. The behaviour of the colour temperature of the colour of a group or single device is unalterably predefined in the case of a device reset.

The configuration options and permanently defined functions are described below.

Setting the behaviour of the brightness in case of bus voltage failure

The parameter "In case of bus/mains voltage failure" is separately available for each group and single device in the parameter node "DALI system... -> Configuration groups -> [x] Group name" or "DALI system... -> Configuration single devices -> [x] Device name".

If there is a voltage failure on the DALI cable (e.g. due to short-circuit, cable break, mains voltage failure on gateway), then the assigned DALI operating devices will also show the configured behaviour in the event of a bus voltage failure. This is guaranteed because the parameter setting in the DALI operating devices is applied as the "System Failure Level" for the brightness after an ETS programming operation.

In the event of a bus failure or mains voltage failure, the current states of the forced positions are also saved so that they can be tracked in the event of bus or mains voltage return if necessary (depending on the configuration of the forced positions).

Active disabling functions or forced position functions are always cancelled by a bus voltage failure and are subsequently inactive in the connection.

Setting the behaviour of the brightness after bus voltage return

The parameter "After bus/mains voltage return" is separately available for each group and single device in the parameter node "DALI system... -> Configuration groups -> [x] Group name" or "DALI system... -> Configuration single devices -> [x] Device name".

In this state, no colour temperature control or colour control is possible after bus or mains voltage return even if the devices are still switched on due to the last brightness state. In this case, the group or single device concerned must either be switched off and switched on again after bus or mains voltage return or must be preset to a brightness value unequal "0%" by a new telegram. Only in this way does the gateway evaluate the state "ON" for the operating devices and permits a control of the colour temperature or colour by new commands.

After mains voltage return, the gateway initialises the configured operating devices briefly. During initialisation, " - -" is displayed on the 7-segment display on the front panel of the device.

The "Activate staircase function" setting is only available when the staircase function is enabled for the affected group or the affected single device.

Setting "Brightness before bus/mains voltage failure": An ETS programming operation of the application or the parameter resets the internally stored brightness state to "OFF".

In the "No reaction" setting: The communication objects of the gateway are initialised with "0" after bus/mains voltage return. In this case, the switching status or brightness value feedback only corresponds to the 'true' brightness state when the group or the single device have been controlled at least once via the KNX or by manual operation.

If mains voltage only on the connected DALI operating devices (e.g. supply from an external mains conductor) is switched on or the gateway is also switched on again and the response is configured to "no reaction", the operating devices set themselves to the brightness specified in their "Power-On level". After an ETS programming operation, this value is programmed into the operating devices by the gateway and corresponds to the setting of the parameter "After bus /mains voltage return". In the settings "Brightness before bus/mains voltage failure" and "Activate staircase function", the command "no reaction" is programmed as a power-on level into the operating devices. In the case of all other settings, the configured commands are applied directly in the operating devices. If the mains voltage of the gateway is switched on, the device executes the parameter "After bus/mains voltage return" only after initialisation. It may occur that the DALI operating devices react more quickly after bus voltage return and set themselves to the power-on level before the gateway can transmit individual commands on the DALI line. This may result in short brightness jumps. If KNX telegrams for groups or single devices are received during the initialisation of the gateway, the device will perform the most recently specified command and not the configured behaviour after the bus voltage returns.

When using standby switch-off and the delay until start-up of the DALI devices, ensure that the parameter "After bus/main voltage return" is configured as "Switch off". This means that the affected devices do not switch on directly when the mains voltage returns but only after they have received an appropriate DALI command from the gateway via the DALI cable.

In the case of forced position as supplementary function: The communication object of the forced position can be initialised separately after the bus voltage returns. This has an effect on the reaction of the group or single device if the forced position is activated when the bus voltage returns. The configured behaviour "after bus/mains voltage return" will only be executed if no forced position on bus voltage return is activated.

With disabling function as supplementary function: Active disabling functions are always inactive after bus or mains voltage return.

Manual operation is possible only when the mains voltage supply to the gateway is switched on. Manual operation ends in case of bus voltage failure, bus voltage return or mains voltage failure.

Presetting the behaviour of the brightness after an ETS programming operation

The parameter "After ETS programming operation" is available separately for each group and each single device in the parameter node "DALI system... -> Configuration groups -> [x] Group name" or "DALI system... -> Configuration single devices -> [x] Device name".

In this state, no colour temperature control or colour control is possible after an ETS programming operation of the operating devices concerned even if the devices are still switched on due to the last brightness state. In this case, the group or single device concerned must either be switched off and switched on again after the ETS programming operation or must be preset to a brightness value unequal "0%" by a new telegram. Only in this way does the gateway evaluate the state "ON" for the operating devices and permits a control of the colour temperature or colour by new commands.

The configured behaviour will be executed after every application or parameter download by the ETS. A simple download of the physical address alone or partial programming of only the group addresses has the effect that this parameter is disregarded and that the configured "Behaviour after bus voltage return" will be executed instead.

An ETS programming operation can only be executed if the mains voltage supply of the DALI gateway is switched on.

In the "no reaction" setting: The communication objects of the gateway are initialised with "0" after a programming operation. In this case, the switching status or brightness value feedback only corresponds to the 'true' brightness state when the group or the single device have been controlled at least once via the KNX or by manual operation. In this setting, feedback objects set as actively transmitting do not transmit a telegram.

After an ETS programming operation, the disabling functions and the forced-positions are always deactivated.

After an ETS programming operation, the gateway initialises itself and configures the connected operating devices with relevant data via the DALI cable (e.g. minimum brightness, maximum brightness, power-on level, system failure level). For this reason, the entire DALI system should ideally be connected and completely ready for operation so that all operating devices apply configuration changes. After each DALI commissioning with changes (fully or partially), the application program must be reloaded into the gateway using the ETS. When doing so, it must be ensured that at least the newly added operating devices or devices, in which the configuration was changed in the ETS, are ready for operation after the ETS programming operation during the commissioning! If there is an error on the DALI cable (e.g. short-circuit, cable break) during the initialisation of the operating devices, then the DALI configuration cannot be executed. The error must then be eliminated and ETS programming restarted. During the configuration operation after an ETS programming operation, "- -" is displayed in the 7-segment display on the front panel of the device.

If KNX telegrams for groups or single devices are received during the initialisation of the gateway, the device will perform the most recently specified command and not the configured behaviour after an ETS programming operation.

Behaviour of the colour temperature in case of bus voltage failure

The behaviour of the colour temperature in case of bus voltage failure, just like the behaviour after an ETS programming operation, is permanently preset to "no change". In the case of a bus voltage failure, the gateway does not transmit any colour temperature commands to the DALI operating devices. The assigned DALI operating devices remain at the colour temperature most recently set provided that the mains voltage supply of the operating devices is still guaranteed. After bus voltage failure, it is no longer possible to control the colour temperature.

DALI operating devices that support the device type "Tunable White" (DT8 - TW) are able to store a specific value during the commissioning, which defines the effective colour change for the failure of the DALI operating voltage for selectively influencing the colour temperature control. The gateway always initialises this DALI parameter in the operating devices during the configuration of the "System Failure Level" for the brightness with the command "no change" (value "255" / "MASK"), so that a failure of the DALI operating voltage (e.g. due to a failure of the mains voltage supply on the gateway) does not cause a change in the colour temperature value most recently specified.

Behaviour of the colour temperature after bus voltage return

The behaviour of the colour temperature after bus or mains voltage return is preset permanently to "Colour temperature before bus voltage failure". After the bus or mains voltage returns, the colour temperature set most recently before the bus/mains voltage failure by relative or absolute dimming and stored internally in the event of a bus/mains voltage failure is tracked.

The gateway transmits the tracked colour temperature to the operating devices only in the state "ON". Consequently, after bus or mains voltage return a tracked or new colour temperature is only then preset in the operating devices via the colour temperature predefined via the KNX after the group or single device was switched on to a brightness value unequal "0 %".

An ETS programming operation of the application or the parameter resets the internally stored colour temperature (0 K). This means that the operating devices concerned normally set themselves to minimum or maximum colour temperature as soon as the group or single device is switched on after bus or mains voltage return (e.g. by the configured behaviour of the brightness after bus voltage return). In this case, the behaviour of the operating devices with regard to the colour temperature is defined immediately by the operating devices and cannot be influenced by the gateway. The colour temperature is only then valid after an ETS programming operation as soon as a colour temperature value is newly specified as a result of relative or absolute dimming. The colour temperature only becomes invalid after an ETS programming operation by recalling a scene with a defined colour temperature value.

The communication objects of the gateway are initialised with "0" after bus/mains voltage return. After bus voltage return, actively transmitting feedback objects transmit a telegram corresponding to the most recently effective colour temperature in the gateway, but only if the DALI group or single device is also switched on after mains voltage return (brightness unequal "0%"). After a mains voltage return, only telegrams corresponding to the effective colour temperature in the gateway are transmitted when the DALI group or single device is actively on after mains voltage return (brightness unequal "0%").

Behaviour of the colour temperature after an ETS programming operation

The behaviour of the colour temperature after an ETS programming operation is permanently set to "no change". After an ETS programming operation, the gateway does not transmit any colour temperatures to the DALI operating devices. This means that the assigned DALI operating devices remain in the colour temperature most recently specified.

The gateway only transmits new colour temperatures in the state "ON" to the operating devices. Consequently, after an ETS programming operation, a new colour temperature specified via the KNX is only set in the operating devices after the group or the single device has been switched on to a brightness value not equal to "0%".

The communication objects of the gateway are initialised with "0" after a programming operation. In this case, the feedback of the colour temperature only then corresponds to a valid value when the colour temperature of the group or single device was controlled at least once via the KNX and the transmission criterion of the feedback was met. Actively transmitting feedback objects of the colour temperature automatically do not transmit any telegram immediately after an ETS programming operation.

The predefined behaviour is executed by the ETS after every application or parameter download. The simple download of the physical address alone or partial programming of only the group addresses has the effect that the setting "no change" is disregarded and that the specified "Behaviour of the colour temperature after bus voltage return" will be executed instead.

If KNX telegrams for groups or single devices are received for controlling the colour temperature after an ETS programming operation during the initialisation of the gateway (indication "- -" on the 7-segment display on the front panel of the device), the device will perform the most recently specified command.

DALI operating devices normally only store the most recently specified colour temperature in the volatile memory. This means that the most recently transmitted colour temperature information will be lost due to a failure of the mains voltage on the operating devices. After mains voltage return, operating devices normally set themselves to minimum or maximum colour temperature provided that the brightness of the group or single device was predefined greater than "0%" (power-on level). The behaviour on the operating devices with regard to the colour temperature after mains voltage return is defined immediately by the operating devices and cannot be influenced or signalled back by the gateway. The gateway can only influence the colour temperature after mains voltage return if the mains voltage was also switched off and switched on again on the gateway (see "Behaviour of the colour temperature after bus voltage return").

Behaviour of the colour temperature after bus voltage return

The behaviour of the colour temperature after bus or mains voltage return is preset permanently to "Colour temperature before bus voltage failure". After the bus or mains voltage returns, the colour temperature set most recently before the bus/mains voltage failure by relative or absolute dimming and stored internally in the event of a bus/mains voltage failure is tracked.

The gateway transmits the tracked colour temperature to the operating devices only in the state "ON". Consequently, after bus or mains voltage return a tracked or new colour temperature is only then preset in the operating devices via the colour temperature predefined via the KNX after the group or single device was switched on to a brightness value unequal "0 %".

An ETS programming operation of the application or the parameter resets the internally stored colour temperature (0 K). This means that the operating devices concerned normally set themselves to minimum or maximum colour temperature as soon as the group or single device is switched on after bus or mains voltage return (e.g. by the configured behaviour of the brightness after bus voltage return). In this case, the behaviour of the operating devices with regard to the colour temperature is defined immediately by the operating devices and cannot be influenced by the gateway. The colour temperature is only then valid after an ETS programming operation as soon as a colour temperature value is newly specified as a result of relative or absolute dimming. The colour temperature only becomes invalid after an ETS programming operation by recalling a scene with a defined colour temperature value.

The communication objects of the gateway are initialised with "0" after bus/mains voltage return. After bus voltage return, actively transmitting feedback objects transmit a telegram corresponding to the most recently effective colour temperature in the gateway, but only if the DALI group or single device is also switched on after mains voltage return (brightness unequal "0%"). After a mains voltage return, only telegrams corresponding to the effective colour temperature in the gateway are transmitted when the DALI group or single device is actively on after mains voltage return (brightness unequal "0%").

Behaviour of the colour in the event of a bus voltage failure

The behaviour of the colour in case of bus voltage failure, just like the behaviour after an ETS programming operation, is permanently preset to "no change". In the case of a bus voltage failure, the gateway does not transmit any commands to the DALI operating devices. The assigned DALI operating devices remain at the colour value most recently set provided that the mains voltage supply of the operating devices is still guaranteed. After bus voltage failure, it is no longer possible to control the colour.

DALI operating devices that support the device type "Colour Control" (DT8 - RGBW) are able to store a specific value during the commissioning, which defines the effective colour for the failure of the DALI operating voltage for selectively influencing the colour control. The gateway always initialises this DALI parameter in the operating devices during the configuration of the "System Failure Level" for the brightness with the command "no change" (value "255" / "MASK"), so that a failure of the DALI operating voltage (e.g. due to a failure of the mains voltage supply on the gateway) does not cause a change in the colour value most recently specified.

Behaviour of colour after bus voltage return

The behaviour of the colour after bus or mains voltage return is preset permanently to "Colour before bus voltage failure". After the bus or mains voltage returns, the colour set most recently before the bus/mains voltage failure by relative or absolute dimming and stored internally in the event of a bus/mains voltage failure is tracked.

The gateway transmits the tracked colour to the operating devices only in the state "ON". Consequently, after bus or mains voltage return a tracked or new colour temperature is only then preset in the operating devices via the colour predefined via the KNX after the group or single device was switched on to a brightness value unequal "0%".

An ETS programming operation of the application or the parameter resets the internally stored colour (#000000). In this case, the behaviour of the operating devices after the mains voltage returns with regard to the colour temperature is defined immediately by the operating devices and cannot be influenced by the gateway. The colour is only then valid after an ETS programming operation as soon as a colour value is newly specified as a result of relative or absolute dimming. The colour does not become valid after an ETS programming operation only by recalling a scene with a defined colour value.

The communication objects of the gateway are initialised with "0" after bus/mains voltage return. After bus voltage return, actively transmitting feedback objects transmit a telegram corresponding to the most recently effective colour in the gateway, but only if the DALI group or single device is also switched on after mains voltage return (brightness unequal "0%"). After a mains voltage return, only telegrams corresponding to the effective colour in the gateway are transmitted when the DALI group or single device is actively on after mains voltage return (brightness unequal "0%").

Behaviour of the colour after ETS programming

The behaviour of the colour after an ETS programming operation is permanently set to "no change". After an ETS programming operation, the gateway does not transmit any colours to the DALI operating devices. This means that the assigned DALI operating devices remain in the colour most recently specified.

The gateway transmits new colours only in the state "ON" to the operating devices. Consequently, after an ETS programming operation, a new colour specified via the KNX is set in the operating devices only after the group or single device has been switched on to a brightness value not equal to "0%".

The communication objects of the gateway are initialised with "0" after a programming operation. In this case, the feedback of the colour only then corresponds to a valid value when the colour of the group or single device was controlled at least once via the KNX and the transmission criterion of the feedback was met. Actively transmitting feedback objects of the colour automatically do not transmit any telegram immediately after an ETS programming operation.

The predefined behaviour is executed by the ETS after every application or parameter download. The simple download of the physical address alone or partial programming of only the group addresses has the effect that the setting "no change" is disregarded and that the specified "Behaviour of the colour after bus voltage return" will be executed instead.

If KNX telegrams for groups or single devices are received for controlling the colour after an ETS programming operation during the initialisation of the gateway (indication "- -" on the 7-segment display on the front panel of the device), the device will perform the most recently specified command.

DALI operating devices normally only store the most recently specified colour in the volatile memory. This means that the most recently transmitted colour information will be lost due to a failure of the mains voltage on the operating devices. After mains voltage return, operating devices normally set themselves to an internally initialized colour provided that the brightness of the group or single device was predefined greater than "0%" (power-on level). The behaviour on the operating devices with regard to the colour after mains voltage return is defined immediately by the operating devices and cannot be influenced or signalled back by the gateway. The gateway can influence the colour temperature only after mains voltage return if the mains voltage was also switched off and switched on again at the gateway (see "Behaviour of the colour after bus voltage return").