ABB i-bus KNX Product Manual page 32


ABB i-bus KNX
Commissioning

1 byte: The control value is sent by the thermostat as a continuous positioning telegram (0...255). The
communication object
appear.
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).
Convert control value to
Options:
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 modulation): The continuous control value is converter to a PWM signal. The PWM
cycle time must be defined in the parameter Cycle time of PWM.

OPEN/CLOSE-Signal: The continuous control value is converted into an OPENING or CLOSING
signal from a parameterizable value. The parameter for entering the threshold value appears.
Cycle time of PWM
in s [10...6,000]
Options:
This parameter sets the cycle time for pulse width modulation.
If the control value is received via a 1 bit value, this parameter serves as the basis for calculation of the
control of the output with

bus voltage failure/recovery,

forced operation,

fault of the control value (control fault) and

characteristic curve correction.
30 2CDC 508 101 D0201 | VAA/S x.230.2.1
Control value, continuous (PWM) 1
PWM (pulse width modulation)
OPEN/CLOSE-Signal
OPEN at control value
greater or equal in % [1...100]
Options: 1...100
This parameter determines the threshold value for the ON/OFF signal. 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.
10...180...10,000
byte, page 43 and further parameters