ABB i-bus FCC/S 1 1 Series Product Manual page 368

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ABB i-bus KNX
Planning and application
Fig. 65: Example
12.5.1.1.2 Calculation
With pulse width modulation, control is implemented by a variable mark-space ratio.
Fig. 66: Calculation
During the time t
On account of t
for continuous control.
the valve is opened and during the time t
ON
= 0.4 x t the valve is set to about 40 %. t
ON CYC
it is closed.
OFF
is the so-called PWM cycle time
CYC
FCC/S 1.X.X.1 | 2CDC 508 200 D0211 Rev A 368