Xylem DIQ/S 281, Operating Manual

Page: 113 / 148

DIQ/S 281 Outputs
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the function are described in the introductory chapter (see section 6.2.3).
In order to set up the
Frequency controller
function for a relay output, the relay
output must be linked with a sensor (see section 6.4).
Settings
Characteristic
curve
If a value for
End value
that is greater than the
Start value
is entered, the output
has a positive characteristic curve.
In order to obtain a negative characteristic curve, a value for
End value
must be
entered that is smaller than the value for
Start value
.
Setting Selection/Values Explanation
Measured variable Main variable
Adjoining variable
Main variable
designates the
actual measured parameter
of the sensor (e.g. pH,
oxygen, etc.).
Adjoining variable
designates an additional
measured parameter (e.g.
temperature).
Start value
within the
measuring range
(sensor-
dependent) Minimum spacing:
5 % of the measuring range
End value
Frequency (f) min.
0 to 120 1/min Minimum spacing:
10 1/min
Frequency (f) max.
Frequency with error
0 to 120 1/min In case of system errors or
sensor errors (see
page 125), the relay
switches with the frequency
specified.
Action Open
Close
Relay action (see
section 6.6.1)