Applications for the DXR2 room automation station guarantee the interaction of disciplines HVAC, lighting, and shading, and provide the necessary coordination functions to this end.
Room operating mode
determination
The elementary room coordination function is the determination of the room operating mode from the central scheduler and local presence/Comfort extension entries on the room operator unit.
Green Leaf
Desigo room automation offers room users interaction with regard to energy management via an innovative operating and displaying concept.
The Green Leaf application function determines whether manual operations negative impact HVAC energy efficiency. A red leaf on the room operator unit informs the room occupant of just such a situation. The leaf returns to green by activating the red lead as the Green Leaf returns the room to an energy efficient state. A room operator unit with Green Leaf display is required to use the Green Leaf application function.
Each discipline has its own rules for determining the influence of energy efficiency that is evaluated in the room coordination function.
The criteria for evaluating energy efficiency are:
- The maximum tolerance to manually shift the room temperature setpoint can be configured.
Description | Name | Default value |
|---|---|---|
Maximum tolerance of room temperature setpoint shift | TolMaxSpTRShft | 2 [K] |
- Fan speed: No configuration. A higher value than the automatic value is classified as inefficient.
- Room operating mode: No configuration. A higher value than the automatic value is classified as inefficient.
- Lighting: No configuration. Lighting setpoints cannot be less energy efficient than the automatic values.
- Shading: No configuration. Shading positions cannot be less energy efficient than the automatic values.
Thermal room load analysis
The application tracks the heating/cooling state of the room as well as average room temperature over 24 hours and notes the Comfort room temperature setpoints for heating and cooling. It decides, based on the present comfort setpoints for cooling and heating, the room temperature and heating/cooling state whether shading supports heating and cooling. The information is provided to the local shading elements in the room and processed based on the settings.
The application outputs the thermal room load condition with two states: Load (heating) and discharge (cooling).
Dedicated lock/
enable of Comfort/
HVAC operations
Manual operation on all room operator units for HVAC can be locked based on the specified central operating mode. Manual operation for lighting and blinds is always available and is not impacted by this function.
A parameter determines if manual operation can be locked for HVAC. Manual HVAC operation is locked during the displayed room operating modes, i.e. Comfort cannot be increased and energy efficiency cannot be changed.
Description | Name | Default value |
|---|---|---|
Manual operation lock configuration 1:None | ManOpLockCnf | 3:Protection / Economy |
Room control by switching the operating mode
Trigger signals indicate switch to energy efficiency or Comfort
The room operating mode can automatically control the various applications for HVAC, lighting, or shading. Two trigger signals are available in each room. They are sent to all disciplines on a configured change to room operating mode occurs. The two triggers are "Energy efficiency condition" and "Comfort condition".
You can determine which trigger to send to the disciplines for each change in operating mode.
Description | Name | Default value |
|---|---|---|
Comfort/Pre-Comfort/Economy to Protection 1:None | CmfPcfEcoToPrt | 2:Energy efficiency condition |
Comfort/Pre-Comfort to Economy Enumeration see CmfPcfEcoToPrt | CmfPcfToEco | 2:Energy efficiency condition |
Comfort to Pre-Comfort Enumeration see CmfPcfEcoToPrt | CmfToPcf | 2:Energy efficiency condition |
Protection/Economy/Pre-Comfort to Comfort Enumeration see CmfPcfEcoToPrt | PrtEcoPcfToCmf | 3:Comfort condition |
Protection/Economy to Pre-Comfort Enumeration see CmfPcfEcoToPrt | PrtEcoToPcf | 1:None |
Protection to Economy Enumeration see CmfPcfEcoToPrt | PrtToEco | 1:None |
Repeat trigger
The "Energy efficiency condition" trigger can be repeated automatically. The number of repeats to the disciplines as well as the time between repetitions can be configured.
Description | Name | Default value |
|---|---|---|
Repetition time energy efficiency trigger A repeat of the trigger overrides local, manual commands. The parameter affects only the automatic trigger. | RptTiEefTrg | 60 min |
Repetition number energy efficiency trigger The parameter affects only the automatic trigger. | RptNumEefTrg | 0 |
Example
Reactions to the trigger can be configured for the specific discipline. The following table provides an overview on a possible configuration.
Description | Name | Default value |
|---|---|---|
Presence button | CmfCndTrg | HVAC: No impact |
Lighting: On starts constant lighting control. | ||
Shading: Stop automatic function | ||
Presence button | EefCndTrg | HVAC: Reset setpoint offset |
Lighting: Immediate off Stops constant lighting control. | ||
Shading: Enable or manual operation and transition to automatic position. | ||
Central scheduler | EefCndTrg | HVAC: Reset setpoint offset |
Lighting: Off with prior flashing Stops constant lighting control. | ||
Shading: Enable or manual operation and transition to automatic position. |
Impact of the trigger on HVAC
A manually adjusted setpoint for HVAC applications can be reset using the trigger for "Energy efficiency condition". Control is reset to automatic. The trigger acts on both the temperature setpoint as well as the setpoint for the fan stage.
The application can also recognize whether the change to the room operating mode from an automatic function or was the result of a manual operation. It can be considered during configuration.
Description | Name | Default value |
|---|---|---|
Fan command for energy efficiency condition trigger at automatic 1:None. The manual fan stage is maintained. | FanCmdEefAuto | 2:Automatic |
Fan command for the energy efficiency condition trigger at manual | FanCmdEefMan | 2:Automatic |
Operating command for energy efficiency condition trigger at automatic 1:None. The manual temperature setpoint is maintained. | OpCmdEefAuto | 2:Automatic |
Operating command for energy efficiency condition trigger at manual | OpCmdEefMan | 1:None |
For HVAC applications, rapid ventilation can be activated using the "Energy efficiency condition" and "Comfort condition" trigger. This supplies a room with rapid ventilation with fresh air for a configurable period.
The application can also recognize whether the change to the room operating mode from an automatic function or was the result of a manual operation. It can be considered during configuration.
Description | Name | Default value |
|---|---|---|
Rapid ventilation runtime | TiRnRpdVnt | 60 min |
Operating command for energy efficiency condition trigger at automatic 1:None. No reaction to trigger | OpCmdEefAuto | 1:None |
Operating command for energy efficiency condition trigger at manual | OpCmdEefMan | 1:None |
Operating command for the comfort condition trigger at automatic | OpCmdCmfAuto | 1:None |
Operating command for comfort efficiency condition trigger at manual | OpCmdCmfMan | 1:None |
Impact of the trigger on lighting
For lighting applications, lighting can be switched on, off, or reset to automatic using the triggers "Energy efficiency condition" and "Comfort condition".
The application can also recognize whether the change to the room operating mode from an automatic function or was the result of a manual operation. It can also be considered during configuration.
Description | Name | Default value |
|---|---|---|
Operating command for energy efficiency condition trigger at automatic 1:None | OpCmdEefAuto | 1:None |
Operating command for energy efficiency condition trigger at manual | OpCmdEefMan | 1:None |
Operating command for the comfort condition trigger at automatic | OpCmdCmfAuto | 1:None |
Operating command for comfort efficiency condition trigger at manual | OpCmdCmfMan | 1:None |
Impact of the trigger on blinds
For blinds applications, blinds can be held or reset to automatic using the triggers "Energy efficiency condition" and "Comfort condition".
The application can also recognize whether the change to the room operating mode from an automatic function or was the result of a manual operation. It can also be considered during configuration.
Description | Name | Default value |
|---|---|---|
Operating command for energy efficiency condition trigger at automatic 1:None. No reaction to trigger. | OpCmdEefAuto | 2:Automatic |
Operating command for energy efficiency condition trigger at manual | OpCmdEefMan | 2:Automatic |
Operating command for the comfort condition trigger at automatic | OpCmdCmfAuto | 1:None |
Operating command for comfort efficiency condition trigger at manual | OpCmdCmfMan | 1:None |