ABB i-bus KNX Product Manual page 57

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ABB i-bus KNX
Parameters
7.4.1.2.6 —
Dependent parameter
Actuate additional-stage heating via
This parameter is not visible if the Additional-stage heating parameter is deactivated.
This parameter is not visible if the Actuator channel option has been selected in the Channel function
parameter.
Options:
The way the control value for the additional-stage heating is to be output is set using this parameter.
The parameter options are dependent on the values selected in the Additional-stage heating,
Actuate basic-stage heating via and Actuate basic-stage cooling via parameters.
•
Internal channel output (valve): If the internal output is selected, the control value is output directly on
this physical output where it is converted into the corresponding output signal.
In parallel to the actuation via the corresponding internal output, the control value is also output via
the related Status Control value Additional-stage heating group object.
4-pipe system (selection in the Type of heating/cooling system parameter: 4-pipe):
Depending on the selection in the Actuate basic-stage heating via and Basic-stage cooling parameters,
it may not be possible to select all options. If the valve output has already been selected here,
then it cannot also be used as an output for the additional-stage heating.
Example:
If the Internal channel output (valve) option has been selected as the output for the basic-stage heating,
this cannot be selected as the output for the additional-stage heating.
2-pipe system (selection in the Type of heating/cooling system parameter: 2-pipe):
In a 2-pipe system, heating and cooling are undertaken using the same device (e.g. cooling ceiling and
floor heating). Here it is possible that either the same valve is used for heating and cooling or that two
valves are used because the heat/cooling is output into the room via a dedicated heating/cooling coil.
For this reason it is therefore possible here to output the control values for heating and cooling on the
same output.
•
Group object: If Group object has been selected as the option, there is no actuation via any of the
internal outputs, instead the control value is only output on the bus.
The control value is output via the related Status Control value Additional-stage heating group object.
The settings for the exact control parameters are made in the Temperature controller – Additional-stage
heating parameter window.
The settings for the actuation of the control values via the valve output are made in the valve parameter
window.
Internal channel output (valve)
Group object
Note
Note
VC/S 4.x.1 | 2CDC508220D0211 Rev. A 55