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®
ABB i-bus
KNX
Parameters
—
7.10.2.6.1.2
Dependent Parameter
Limitation x upper limit
Options:
This parameter determines the highest permissible fan speed when limitation is activated.
7.10.2.7
Switch fan speed via 1-bit objects
Options:
This parameter enables additional group objects for switching the fan, which make it possible to
control the fan speed directly via specific 1-bit group objects.
•
Deactivated: Deactivates and hides the additional group objects.
•
Switch off to active fan speed using "0" only: This enables the additional group objects. These
objects switch the fan off if the Off command ("0") is assigned to the Switch object for the fan
speed that is currently active.
•
Switch off to any 1-bit fan speed using "0": This enables the additional group objects. These ob-
jects switch the fan off if an Off command ("0") is sent to any of the Switch objects.
The following group objects appear if you select Switch off to active fan speed using "0"only or
Switch off to any 1-bit fan speed using "0":
•
Switch fan speed 1
•
Switch fan speed 2
•
Switch fan speed 3
•
Status Fan speed 1
•
Status Fan speed 2
•
Status Fan speed 3
The Switch objects enable you to control the relevant fan speed (1/2/3) directly. The Status objects
indicate whether the fan speed is now at the current speed.
Since a continuous fan has no specific speeds but may still need to be operated/displayed via 1-bit
group objects, each object is assigned a specific value:
•
Group objects for Switch fan speed X:
– Switch fan speed 1: 33%
– Switch fan speed 2: 66%
– Switch fan speed 3: 100%
•
Group objects for Status Fan speed X:
– Status Fan speed 1: 33%
– Status Fan speed 2: 66%
– Status Fan speed 3: 100%
The distinction between the two switch off variations ("0" sent to the active or any group object)
provides for a scenario where the encoder sends the group objects cyclically, or always sends all
3 group objects simultaneously. This can result in the fan switching on briefly or not at all. To pre-
vent this, the controller can be set to ensure that the fan is only switched off via the active speed
at that particular moment.
0...100
Deactivated
Switch off to active fan speed using "0" only
Switch off to any 1-bit fan speed using "0"
Note
FCC/S 1.X.X.1 | 2CDC 508 200 D0211 Rev A 286
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