Xylem DIQ/S 281, Operating Manual

Page: 124 / 148

Outputs DIQ/S 281
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03/2023
124
Settings
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).
Nominal value
within the measuring
range (sensor-
dependent) Nominal value the measured value
is regulated to
Xp
5 ... 100 %
-5 ... -100 %
% of the measuring
range Proportional range of the controller.
Negative values result in a positive
characteristic curve.
Imin
0 ... 20 mA Lower current limitation *
Imax
0 ... 20 mA Upper current limitation *
* Note:
Spacing between
Imin
and
Imax
:
at least 5 mA
Io
0 ... 20 mA Current value on the output if the
measured value equals the
Nominal
value
ti
0 ... 9999 s Hold-back time:
Integral part of the controller
(
0
= not effective)
td
0 ... 9999 s Reset time:
Differential part of the controller
(
0
= not effective)
Behavior at
error
Fixed current value
In the case of an error, the current
output supplies the current value
defined in the
Current with error
field (any in the range
0 ... 21 mA).
Unchanged
In the case of an error, the current
on the output remains unchanged.