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BFD 3SAP-19N000-U01-LA2-C_ _ _ _ _
Ultrasonic sensors
5
Primary Device Functions (continued)
5.5
Signal Quality
5.5.1
Description
The signal quality is specified in percent steps as a value
between 0 and 100%. If the signal quality cannot be
provided, a substitute value of 0xFF (255) is output. The
threshold value for the monitoring function can be set and
is used to define two states of the signal quality. The signal
quality is considered to be good at or above the threshold
value; the signal quality is considered to be bad below the
threshold value. A state change from good to bad signal
quality triggers the Low Signal Quality Level IO-Link event.
The output of the current signal quality can provide
support both when setting up as well as during predictive
maintenance. When setting up, the location, the orientation
and the environmental conditions can be adapted to
achieve a satisfactory signal quality level. If the signal
quality is checked regularly, a deterioration of the
performance can be preventatively combated.
5.5.2
Mathematics/Algorithm
The deviations between the control parameters currently
prevailing in the system and the optimum values are
evaluated.
These include the gain values as well as the deviations
between setpoint and actual amplitudes.
5.5.3
Process Data
Object ID
Name
0x0020 (32)
Current Signal Quality Output of the current signal quality in percent steps from 0% to 100%. Input
0x0021 (33)
Signal Quality Bad
Tab. 5-24: Signal quality – process data
Also see section Process Data Profiles on page 10.
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english
In addition, the monitoring of the signal quality offers an
immediate response in the event of a critical failure. This
reaction is triggered if the signal quality drops below the
adjustable threshold value and gives the all clear if a
satisfactory signal quality level is once again achieved. The
signal state is also indicated by an orange LED that
illuminates if the signal quality is below the threshold value.
The function can be deactivated by setting the threshold
value to zero.
Description
Output of the current signal quality evaluation; TRUE means a signal
quality below the threshold value, FALSE means a signal quality equal
to or above the threshold value.
Direction
Input
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