ABB SmartTouch i-bus KNX Product Manual page 251

Note
The following parameter is available when the "Control function" parameter is
set on "Heating and cooling with additional stages".
The same parameter is available which is also available when the "Control
function" parameter is set on "Heating and cooling".
10.24.109 Combined heating and cooling modes — Additional heating/cooling stage control
value output
Options:
This parameter is used to define whether the control value is transmitted to the climate control
actuator using one or two objects. If the climate control actuator has separate control value
inputs for heating and cooling, or if separate actuators are used, then the option "Via 2 objects"
must be selected. Select the option "Via 1 object" if a single actuator only has one object that
receives both the heating and the cooling control values.
Note
This parameter is only available when the "Control function" parameter is set on
"Heating and cooling with additional stages".
Product manual 2CKA00xx73xxxxx
KNX control elements and application parameters
Via 1 object
Via 2 objects
Application "Internal RTC"
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