
ABB i-bus
®
KNX
Planning and application
FCA/S 1.x.x.1 | 2CDC508134D0202 251
4.3.3.3
Pulse width modulation
– calculation
With pulse width modulation, control is implemented by a variable mark-space ratio.
During the time t
ON
the valve is opened and during the time t
OFF
it is closed.
On account of t
ON
= 0.4 x t
CYC
the valve is set to about 40 % on. t
CYC
is the so-called PWM cycle time for
continuous control.
Summary of Contents for i-bus KNX
Page 1: ...ABB i bus KNX Fan Coil Actuators FCA S Product Manual ...
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Page 262: ...ABB i bus KNX Appendix 260 2CDC508134D0202 FCA S 1 x x 1 A 6 Notes ...
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