Baumer OM20 - Invalid Value Handling

Baumer Functions | 8
OM20/ OM30 RS485 with Modbus RTU | V1 Operating Manual 33
8.6 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 objects to be measured in a dynamic application. Invalid mea-
sured values occur when
n
there are no objects in the measurement range (MR) or
n
the signal is too weak due to reflections or unidentifiable objects.
The function can be configured via the following parameter:
n
Time period (Hold Time): The time period indicates how long an invalid measured value
should be suppressed. The time period is used to mask invalid measured values at the out-
puts. The output is set only after expiration of the time period.
Invalid Value Handling – example 1
n
Parameters:
▪ Time period (Hold Time): 1000 ms
n
Interpretation: Invalid measured values are ignored at the digital output. The last valid value
is maintained during the time period.
Digital output
50
250
1 2 3 4 5
s
mm
Hold Time
Signal quality
Hold Time
Ill.9: Invalid Value Handling – example 1