User's Manual
Table Of Contents
- 8 Parameter reference
- 9 Service and maintenance
- 10 Diagnosing and troubleshooting
- 11 Technical data
- 12 Dimension drawings
- 12.1 Threaded horn antenna
- 12.2 Threaded horn antenna with extension
- 12.3 Flanged horn antenna
- 12.4 Flanged horn antenna with extension
- 12.5 Flanged encapsulated antenna (2"/DN50/50A sizes only)
- 12.6 Flanged encapsulated antenna (3"/DN80/80A sizes and larger)
- 12.7 Threaded PVDF antenna
- 12.8 Threaded connection markings
- 12.9 Raised-Face flange per EN 1092-1 for flanged horn antenna
- 12.10 Raised-Face flange per EN 1092-1 for flanged encapsulated antenna
- 12.11 Flat-Face flange
- 12.12 Process connection tag (pressure rated versions)
- A Appendix A: Technical reference
- B Appendix B: PROFIBUS PA profile structure
- C Appendix C: Communications via PROFIBUS
- D Appendix D: Certificates and Support
- 13 List of abbreviations
- 14 LCD menu structure
- Glossary
- Index
Appendix B: PROFIBUS PA profile structure
B.2 Block Model
SITRANS LR250 (PROFIBUS PA)
224 Operating Instructions, 01/2014, A5E32221386-AB
①
Distance/SV2
⑥
Level
②
High level point (default: 100%)
⑦
Low level point (default: 0%)
③
Sensor value
a)
⑧
Level offset
c)
④
High calibration point
⑨
Secondary value 1
⑤
Sensor reference point
b)
⑩
Low calibration point
a)
Referenced from Sensor Reference Point.
b)
Sensor Offset (2.3.7.3.)
is a constant offset that can be added to or subtracted from sensor
reference point to compensate if the sensor has been changed.
c)
Level Offset (default O) can compensate for specific vessel configurations.
3. Linearization can be carried out to accommodate complex vessel shapes, or to provide level
to volume conversion.
4. The Transducer Block provides three possible outputs:
– Primary Value (PV) / Level or Volume
– Secondary Value 1 (SV1) / Level
– Secondary Value 2 (SV2) / Distance (sensor units)