ABB i-bus KNX, Product Manual, Page: 102 / 264

ABB i-bus
®
KNX
Commissioning
100 2CDC508134D0202 | FCA/S 1.x.x.1

1-byte: The control value is sent by the room thermostat as a continuous positioning telegram
(0…255).
Note
1 byte control
For 1 byte control, a value of 0…255 (corresponds to 0%…100%) is preset by the room thermostat.
This process is also known as
continuous control . At 0%, the output switches OFF (the valve is closed);
at 100%, the output switches ON (the valve is fully opened).
Selection of option 1-byte:
Dependent parameter:
Convert control value to
Options: PWM (pulse width modulation)
OPEN/CLOSE-Signal
This parameter determines how the received control value (0…255) can be processed. The control
value can be converted to a PWM signal or an ON/OFF signal.

PWM (pulse width modulated): With this option, the continuous control value is converted to a
PWM signal. The parameter for entering the PWM cycle time is displayed.

OPEN/CLOSE-Signal : With this option, the continuous control value is converted to an OPEN
or CLOSE signal from a defined parameterized value. The parameter for entering the threshold
value is displayed.
OPEN at control value
greater or equal in % [1...100]
Options: 1
…100
The output switches ON continuously if the value parameterized here is greater than or
equal to the received control value. If a control value that is less than the parameterized
value is received, the output switches OFF.