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System 182
Function
Settings
Characteristic curve
ba75504e07
04/2012
6.4.6 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 6.3.3).
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 6.2.1).
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.
Selection/Values
Main variable
Adjoining variable
within the
measuring range
(sensor-
dependent)
0 ... 100 %
5 ... 100 s
0 ... 100 %
Open
Close
Relay outputs
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 6-
25), the relay
switches with the
pulse-width
specified.
Relay action
6 - 19
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