Direct Operation; Switchover Between Automatic And Direct Operation - ABB i-bus KNX Product Manual

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ABB i-bus KNX
Planning and application
4.1.3

Direct operation

With direct fan control via the ABB i-bus
via three floating contacts. A single-speed, two-speed or three-speed fan can be connected.
The device sets the fan speed in accordance with a value received via the ABB i-bus
received as a 1 byte value.
1 byte value
4.1.4

Switchover between automatic and direct operation

The device can be switched 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 1 byte value
received.
Fan control is changed back to automatic operation if a 1 is received on the respective communication
object.
The current status of automatic operation is fed-back via a 1 bit value.
242 2CDC508134D0202 | FCA/S 1.x.x.1
Hexadecimal
0 00
1 01
2 02
3 03
>3 >03
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KNX, a fan drive is connected directly to the device and switched
Binary value bit
76543210
00000000 0 (OFF)
00000001 Fan speed 1
00000010 Fan speed 2
00000011 Fan speed 3
>00000011 Values greater than 3 are ignored
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. The value is
Fan speed