Photoelectric distance sensor
OGD25x OGD55x
9
Switching status of the outputs
Output function
Object reflectivity (R)
Switching status
[Hno]
R < [SPx] - hysteresis
Open
R > [SPx]
Closed
[Hnc]
R < [SPx] - hysteresis
Closed
R > [SPx]
Open
4.2.3 Dynamic hysteresis
The measured values detected by the sensor vary depending on the situation. The highest fluctuation
of measured values occurs in case of a small signal to noise ratio. This is the case when very dark
targets are detected and when there is very much ambient light. Therefore, the reset point is
automatically set by the sensor after the switch point has been selected.
Very dark background = high hysteresis is selected.
Very bright background = small hysteresis is selected.
The minimum distance between object and background is reduced if the background is very bright
(e.g. white). A bright background enables the detection of smaller objects.
4.3 Output function window
The window function enables the monitoring of a defined acceptable range. Both outputs (OUT1 and
OUT2) can be set and taught as window function. The switching output (OUT1 and OUT2) states are
derived based on the measurement parameters “distance” or “reflectivity”. The measurement
parameter can be selected individually for each switching output.
Hystereses set automatically by the sensor ensure that the switching status of the output
remains stable at the window limits. Please refer to the data sheets for the hystereses.
4.3.1 Window function – distance
It is possible to define an object detection window for output [OU1] / [OU2].
Switches when the object is detected ([OUx] = [Fno])
[nSPx]
[FSPx]
[Fno]
1
[nSPx]: Switch point "near"
[FSPx]: Switch point "far"
1
Window
If the measured value is between the switch point "near” [nSPx] and the switch point "far" [FSPx], the
output is switched on (if [OUx] = [Fno]).
