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Outputs
Function
Settings
Characteristic
curve
Function
114
Pulse-width output
6.6.6
The characteristic of the pulse width output is laid down in the
value
Pulse width (v) min.
,
of the function are described in the introductory chapter (see section 6.2.3).
In order to set up the
output must be linked with a sensor (see section 6.4).
Setting
Measured variable
Start value
End value
Pulse width (v) min.
Pulse width (v) max.
Cycle duration (T)
Error pulse width
Action
You can specify the minimum and maximum pulse width (v). This determines
the steepness of the characteristic curve of the output.
Cleaning
6.6.7
Cleaning
The
function enables the time controlled automatic start of the sensor
cleaning function with the aid of a relay of the combination output module.
The relay controls the DIQ/CHV valve module and switches the compressed air
for the CH sensor cleaning head on or off.
Pulse width (v) max.
and
Pulse-width output
function for a relay output, the relay
Selection/Values
Main variable
Adjoining variable
within the
measuring range
(sensor-
dependent)
0 ... 100 %
5 ... 100 s
0 ... 100 %
Open
Close
DIQ/S 281
Start value
settings. The fundamentals
Explanation
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).
Minimum spacing:
5 % of the measuring range
Minimum spacing:
Cycle duration
10 % of the
(T)
Length of the switching
period T
T = (t
+ t
)
on
off
In case of system errors or
sensor errors (see
page 125), the relay switches
with the pulse-width
specified.
Relay action (see
section 6.6.1)
ba76226e02
End
,
03/2023
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