Direct Operation; Switchover Between Automatic And Direct Operation - ABB i-bus KNX FCA/S 1.1M Product Manual

ABB i-bus KNX
4.2.2

Direct operation

4.2.3 Switchover between
automatic and direct
operation
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Planning and application
With direct fan control via the ABB i-bus
to the Fan Coil Actuator and switched via three floating contacts.
A single speed, two speed or three speed fan can be connected.
The Fan Coil Actuator sets the fan speed in accordance with the value
received via the ABB i-bus
The conversion of the received 1 byte value to the fan speed occurs as with
the automatic fan control via the parameterised threshold values.
1 byte value
0... 9 %
10... 39 %
40... 69 %
70...100 %
In the Fan Coil Actuator you can switch between automatic operation and
direct operation. The changeover to manual fan control is implemented via
a 1 bit value. The fan speed is switched in accordance with the received
1 byte value.
The fan control is changed back to automatic operation if a 1 is received
in the respective communication object.
The current status of automatic operation is fed-back via a 1 bit value.
®
, a fan drive is connected directly
®
. The value is received as a 1 byte value.
Fan speed
0 (fan off)
1
2
3
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