Table of Contents
Advertisement
Outputs
Function
Settings
Characteristic
curve
Function
100
6.6.6 Pulse-width output
The characteristic of the pulse width output is laid down in the Start value, End
value, Pulse width (v) min. and Pulse width (v) max. settings. The fundamentals
of the function are described in the introductory chapter (see section 6.2.3).
In order to set up the Pulse-width output function for a relay output, the relay
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.
6.6.7 Cleaning
The Cleaning 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.
Selection/Values
Main variable
Adjoining variable
within the
measuring range
(sensor-
dependent)
0 ... 100 %
5 ... 100 s
0 ... 100 %
Open
Close
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:
10 % of the Cycle duration
(T)
Length of the switching
period T
T = (t
+ t
)
on
off
In case of system errors or
sensor errors (see
page 112), the relay switches
with the pulse-width
specified.
Relay action (see
section 6.6.1)
ba77244d01
DIQ/S 281
08/2020
Advertisement
Table of Contents
