Invalid Value Handling - Baumer OM20 IO-Link Operating Manual

Baumer
8.5

Invalid Value Handling

The Invalid Value Handling function defines the behavior of the sensor when the sensor records
an invalid measured value. This function can be used, for example, to mask recurring reflections
of machine parts or reflections of measurement objects in a dynamic application. Invalid mea-
sured values occur when
there are no objects in the measurement range (MR) or
n
the signal is too weak due to reflections or unidentifiable objects.
n
The function can be configured via the following parameters:
Specify the status of the analog output in case of invalid measured values. Possible options:
n
▪ The analog output holds the last valid measured value.
▪ The analog output holds the min. output point.
▪ The analog output holds the max. output point.
Time period (Hold Time) during which an invalid measured value should be suppressed.
n
The time period is used to mask invalid measured values at the outputs. The output (digital
or analog output) is set only after expiration of the time period.
Invalid Value Handling – example 1
Parameters:
n
▪ Type of Invalid Value Handling: min. output point
▪ Time period (Hold Time): 1000 ms
Interpretation: Invalid measured values are ignored at both the digital and analog output.
n
The last valid value is maintained during the time period. The type of Invalid Value Handling
has no effect yet at this point.
mm
250
50
Ill. 8: Invalid Value Handling – example 1
Invalid Value Handling – example 2
Parameters:
n
▪ Type of Invalid Value Handling: min. output point
▪ Time period (Hold Time): 1000 ms
Interpretation: After expiration of the time period, the placeholder for an invalid value is out-
n
put at the digital output. For the analog output, the type of Invalid Value Handling applies
and the electrical power drops to 4 mA.
V2 | OM20/OM30 IO-Link
Digital output
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Hold Time Hold Time
mA
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4
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Signal quality
Operating Manual
Functions
Analog output
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Hold Time Hold Time
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