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®
ABB i-bus
EIB / KNX
3.3
Control of fans, lighting
and electric heaters
3.3.1
Automatic fan control
3.3.2
Direct fan control
via the EIB / KNX
Application and planning
Function
For automatic fan control, the fan drive is connected directly to the
Fan Coil Controller and switched via three floating contacts.
It is possible to connect a 1-speed, 2-speed or 3-speed fan.
The fan speed is set automatically depending on the control value.
The corresponding fan speeds are parameterised for example for the
following control value ranges:
Control value
0... 9 %
10...39 %
40...69 %
70...100 %
Configuration
To configure automatic fan control, the following parameters must be set:
– Parameter: Type of fan
(parameter window "Fan")
Option: "local"
– Parameter: Threshold value for switching on at fan speed X
(parameter window "Fan")
Option [%]: "0...100" (set value)
Function
For direct fan control, a fan drive is connected directly to the Fan Coil
Controller and switched via three floating contacts. It is possible to connect
a 1-speed, 2-speed or 3-speed fan.
The Fan Coil Controller sets the fan speed depending on a value that is
received via the EIB / KNX. The value is received as a 1-byte value at the
communication object "Fan – Manual operation of fan". The conversion of
the 1-byte value received into the fan speed is carried out as for automatic
fan control via the parameterised threshold values.
1-byte value
0... 9 %
10...39 %
40...69 %
70...100 %
Configuration
To configure direct fan control, the following parameters must be set:
– Parameter: Type of fan
(parameter window "Fan")
Option: "local"
– Parameter: Threshold value for switching on at fan speed X
(parameter window "Fan")
Option [%]: "0...100" (set value)
Fan speed
0 (fan off)
1
2
3
Fan speed
0 (fan off)
1
2
3
15
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