Baumer OM20, Operating Manual

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9 | Diagnostic data Baumer
40 Operating Manual OM20/OM30 IO-Link | V2
9.2 Response delay
The response delay is equivalent to the time elapsed between the triggering of the measure-
ment (internal signal) and the change in the measured value at the output.
The duration of the response delay depends on the exposure time. The sensor automatically
adjusts its exposure time to the object to be measured in order to always receive an optimum
light quantity and thus achieve a sufficient exposure reserve. The exposure time depends on
the properties of the measured surface (color/structure, etc.) and the alignment of the sensor to
the object to be measured. Dark objects to be measured reflect less light and thus need longer
exposure times than light-colored objects; the response delay increases.
Measurement Calculation
Trigger Output
Response delay
Ill. 22: Response delay
INFO
Filter settings do not affect the response delay.
IO-Link diagnostic data: Response delay
Name Description
Measurement Values. PV1 Response Delay Output of the response delay.
9.3 Exposure reserve
The exposure reserve indicates the light quantity reflected by the measurement object (as a rel-
ative factor without unit). The exposure reserve helps you with the following problems, among
others:
n
Check whether a valid measurement result is present (signal quality). The signal quality is
weak
▪ when the sensor is not optimally aligned, and
▪ when the distance between the sensor and measurement object is too large.
n
During ongoing operation: Check the front panel of the sensor for contamination – if the ex-
posure reserve decreases over time, it may be an indication of increased contamination of
the front panel. Use the histogram function for this purpose (
Histogram function [
}
42] ).
IO-Link diagnostic data: Exposure reserve
Name Description
Exposure Reserve. Exposure Reserve Output of the exposure reserve.