ABB i-bus KNX Product Manual page 211

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ABB i-bus KNX
Group objects
No.
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The group object is enabled if the Deactivated option was not selected for the Additional-stage cooling parameter in the
Application parameters parameter window.
This group object is hidden in actuator mode.
The group object data point type depends on the selected application and the associated control.
Output is via a 1-byte value (DPT 5.001) when the following control types are selected:
•
2-point 1 byte (0/100%)
•
PI continuous (0...100 %)
Output is via a 1-bit value (DPT 1.001) when the control types are selected:
•
2-point 1 bit (On/Off)
•
PI PWM (On/Off)
The control type is preselected by the parameter Additional-stage cooling in this case.
A certain type of control is preset depending on the selected application. The control type is freely selectable
if Free configuration is selected in this parameter.
This group object outputs the control value for Additional-stage cooling.
Use of a physical device output (e.g. valve) for additional-stage cooling:
•
The group object contains the control value that the controller uses to control the output.
Additional-stage cooling is controlled only via group object (no internal use):
•
The group object sends the control value for controlling a different actuator.
Depending on the input group objects of the actuator, it could be necessary to change the output of the control value
between 1 byte and 1 bit. This is performed via the parameters described above.
Cyclical sending and sending after a change in the control value can be set in Extended settings in the
Temperature controller – Additional-stage cooling parameter window.
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This group object is always enabled in controller mode.
This group object is hidden in actuator mode.
This group object indicates the current actual temperature value (room temperature) that the controller is using.
This value consists of the value(s) measured via the physical device inputs and the values received via the two group objects
External temperature 1 and External temperature 2.
The values recorded via the inputs are averaged, and this mean value is then combined with the values received via the group
object. A weighting factor can be defined for the combination process.
The transmission reaction of this group object is set in the Temperature controller parameter window.
This group object can also be used for display on analog room control units and visual display systems.
Object function
Status Control value Additional-stage
cooling
Note
Note
Note
Actual temperature
Note
Name
Channel A – Controller
Channel A – Controller
VC/S 4.x.1 | 2CDC508220D0211 Rev. A 209
Data type Flags
1 byte / 1 bit C, R, T
DPT 5.001 / 1.001
2 bytes C, R, T
DPT 9.001