ABB i-bus KNX Product Manual page 239

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ABB i-bus KNX
Planning and application
12.4.1.1.1 Example
When the device receives a 1-byte control value (continuous control) as an input signal, this value together
with the parameterized cycle time from a PWM calculation is converted into a signal for 2-point control
(ON-OFF-ON).
With PWM control, the received control value (0...100 %) calculated in the control algorithm is converted to
a pulse width modulation. The conversion is based on a constant cycle time. If the device receives
a control value of 20 % and the cycle time is 15 minutes, the valve will be opened for 3 minutes
(20 % of 15 minutes) and closed for 12 minutes (80 % of 15 minutes).
Fig. 29: Example
VC/S 4.x.1 | 2CDC508220D0211 Rev. A 237