ABB i-bus® EIB Universal Interfaces US/U 4.2 US/U ... - WindowMaster
ABB i-bus® EIB Universal Interfaces US/U 4.2 US/U ... - WindowMaster
ABB i-bus® EIB Universal Interfaces US/U 4.2 US/U ... - WindowMaster
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<strong>ABB</strong> i-bus ® <strong>EIB</strong><br />
<strong>Universal</strong> <strong>Interfaces</strong><br />
<strong>US</strong>/U 2.2, GH Q631 0074 R0111<br />
<strong>US</strong>/U <strong>4.2</strong>, GH Q631 0070 R0111<br />
The following example clarifies this:<br />
100%<br />
40%<br />
0%<br />
t ON<br />
t OFF<br />
t<br />
T<br />
CYC<br />
During t ON , the valve is triggered with OPEN (“ON phase”). During t OFF ,<br />
the valve is triggered with CLOSE (“OFF phase”). Due to tON = 0.4 x T CYC ,<br />
the valve is set at approx. 40%. T CYC is the so-called PWM cycle time for<br />
continuous control.<br />
The actuator can trigger specific special positions during “Forced positioning”,<br />
“Valve purge” and “Safety position”. The following diagram provides<br />
an overview:<br />
Start<br />
Is forced<br />
positioning<br />
active?<br />
yes<br />
Trigger forced<br />
positioning<br />
no<br />
Is valve<br />
purge<br />
active?<br />
yes<br />
Valve opened to<br />
maximum for<br />
duration of valve<br />
purge<br />
no<br />
Is fault<br />
mode<br />
active?<br />
yes<br />
Trigger safety<br />
position<br />
no<br />
1 bit<br />
Type of<br />
control<br />
8 bit<br />
Output follows<br />
object “Telegr.<br />
switch”<br />
Control acc. to<br />
object “Control<br />
value (PWM)”<br />
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