wtw DIQ/S 282, Operating Manual, Page: 132 / 186

Outputs DIQ/S 28X
132
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Negative charac-
teristic curve
The proportional output range begins below the initial value. If the proportional
range is undercut or exceeded, the selected behavior comes into force.
Fig. 7-10 Pulse width output
Fig. 7-11 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
0
10
50
90
100
Proportional
band
t
On
t
Of f
50 % 50 %
10 %
10 %
90 %
90 %
Cycle
duration T
Time
Measured value 1 2
Pulse v [%] width
0
50
100
Measured value
Proportional
band
1
50 % of maximum
switching frequency
Maximum
switching frequency
Time
2
Switching frequency f [1/min]
Minumum
switching frequency