Xylem WTW DIQ/S 281 Operating Manual page 90

Outputs
Negative charac-
teristic curve
90
The proportional output range begins below the initial value. If the proportional
range is undercut or exceeded, the selected behavior comes into force.
Pulse width v [%]
100
90
50
Proportional
band
10
0
2 Measured value 1
figure 6-10 Pulse width output
Switching frequency f [1/min]
100
50
Proportional
band
0
2 Measured value
figure 6-11 Frequency output
1 Start value
Measured value with a minimum pulse width or switching frequency
2 End value
Measured value with a maximum pulse width or switching frequency
90%
Cycle
duration T
50%
t
On
10% 90%
Time
Maximum
switching frequency
50 % of maximum
switching frequency
Minumum
1
switching frequency
ba77244d01
DIQ/S 281
10%
50%
t
Of f
Time
08/2020