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BFD 3SAP-19N000-U01-LA2-C_ _ _ _ _
Ultrasonic sensors
5
Primary Device Functions (continued)
5.4
Measurement Profiles
5.4.1
Description
The sensor realizes the measuring Smart Sensor Profile
Ed. 2 according to profile SSP3.2. The profile defines four
different ranges in which a measurement value
(Measurement Value) can be output:
–
The measuring range (Measurement Range)
–
Detection Range
–
Outside of the detection range (Out of Range)
–
No measurement value (No Measurement Data)
Evaluation takes place based on the value Transducer
Value High Res (PDObjectID 0x0025).
Fig. 5-13: Ranges for which a measurement value is output
Measurement Range
Within the measuring range, all values specified in the data
sheet related to measurement accuracy are satisfied.
Information on the size of the measuring range can be
found in parameter MDC Descriptor, which contains the
lower measurement limit (Lower Limit) and upper
measurement limit (Upper Limit).
Detection Range
Outside of the measurement range, a measurement value
output in the non-linear areas (Limited Accuracy Areas) is
still possible, though the accuracy cannot be ensured for
these areas. Limited accuracy is indicated via the
Measurement Warning bit in the process data.
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Outside of the detection range (Out of Range)
Outside of the detection range, the sensor can determine
whether the measurement value is below or above the
detection range. A meaningful measurement value is not
possible in these areas. Instead, a replacement value is
output:
Status
Value
Out of Range Minus
–2,147,483,640 (0x80000008)
Out of Range Plus
2,147,483,640 (0x7FFFFFF8)
Tab. 5-13: Measurement Profiles – Out of Range
In addition to the replacement value, the Measurement
Error bit is set.
No Measurement Data
If no measurement value can be determined, the
replacement value No Measurement Data is output:
Status
Value
No Measurement
2,147,483,644 (0x7FFFFFFC)
Data
Tab. 5-14: Measurement profiles – No Measurement Data
In addition to the replacement value, the Measurement
Error bit is set.
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