ABB i-bus
®
KNX
Parameters
FCC/S 1.X.X.1 | 2CDC 508 200 D0211 Rev A 104
7.4.1.1.1.1.7
—
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 device
option has been selected in the
Device function
parameter.
Options:
Internal output A (valve)
Internal output B (valve) (Not for FCC/S 1.4.1.1)
Internal relay output (Not for FCC/S 1.4.1.1)
Group object
The way the control value for the additional-stage heating is to be output is set using this parame-
ter.
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 output A (valve)
;
Internal output B (valve)
:
If one of the internal outputs is selected, the control value is output directly on this physical out-
put where it is converted into the corresponding output signal.
The outputs A and B are used to actuate valve drives.
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.
Note
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
param-
eters, it may not be possible to select all options. If one of the outputs has already been selected
here, then it cannot also be used as an output for the additional-stage heating.
Example:
If the
Internal output A (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. fan coil unit).
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.
Note
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 outputs are made in the related
valve parameter window.
Only FCC/S 1.2.x.1 & 1.3.x.1: If the
Use 6-way valve
parameter has been parameterized with
Yes
, this parameter is pre-set to
Internal output A (valve)
and cannot be changed.
