ABB i-bus KNX Product Manual page 240

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ABB i-bus KNX
Appendix
12.4.1.1.2 Calculation
With pulse width modulation, control is implemented by a variable mark-space ratio.
Fig. 30: Calculation
During the time t
On account of t
continuous control.
238 2CDC508220D0211 Rev. A | VC/S 4.x.1
the valve is opened and during the time t
ON
= 0.4 x t the valve is set to about 40 %. t
CYC
ON
it is closed.
OFF
is the so-called PWM cycle time for
CYC