ABB i-bus® KNX
PLANNING AND APPLICATION
12.2.2
Basic setpoint
The basic setpoint can be used to change the operating modes
Comfort
,
Standby
and
Economy
via the
bus (ABB i-bus® KNX).
The base setpoint shifts the setpoint for the
Comfort
operating mode. The value to which the base set-
point corresponds (
Comfort heating
or
Comfort cooling
) is defined in the parameter
By changing the base setpoint, the setpoints assigned to the
Standby
and
Economy
operating modes
are also shifted. The relative distances between the setpoints remain unchanged. The setpoints for the
Building Protection
operating modes are not influenced.
The change to the base setpoint applies to both operating modes (
Heating
/
Cooling
).
Note
If only the
Heating
operating mode or
Cooling
operating mode is configured, the base setpoint corre-
sponds to the respective
Comfort
setpoint.
12.2.3
Explanation of the operating modes
The operating modes are used to adjust the setpoint temperatures to the actual room or building uti-
lization. Switchover between the operating modes usually takes place via a central schedule or via Intelli-
gent Building Control. The settings for the operating modes and the setpoints assigned are made in the
parameter window
.
The change between the operating modes takes place via group object
Comfort
The operating mode
Comfort
is used if the room is actively utilized (e.g. people in the room). In operat-
ing mode
Comfort
, the controller attempts to reach the specified room temperature by heating or cool-
ing.
If a presence detector is used, the change from the current operating mode to
Comfort
can additionally
be performed via group object
Presence detector (master/slave)
Standby
The operating mode
Standby
is used to prepare for active room utilization (e.g. before the start of
lessons in schools). If the room is not utilized briefly (e.g. if the room is left or during breaks), the operat-
ing mode
Standby
can also be used. In operating mode
Standby
, the actual temperature may deviate by
a set value from the Comfort temperature. This deviation is usually 2 … 3 K. Heating or cooling is acti-
vated if the deviation is exceeded or fallen below.
Note
The operating mode
Standby
can be used as an intermediate stage during the change from
Economy
to
Comfort
.
Example
The operating mode
Economy
is used for automatic nighttime reduction. If it can be anticipated
when the Comfort temperature must be reached, the operating mode
Standby
can be used as an in-
termediate stage. With the intermediate stage, the Comfort temperature is reached sooner at the
required time.
Product manual | EN-US | VC/S 4.x.1 | 2CDC508220D0211 Rev. B
174
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