Table of contents
SITRANS LR250 (PROFIBUS PA)
6
Operating Instructions, 01/2014, A5E32221386-AB
12.10
Raised-Face flange per EN 1092-1 for flanged encapsulated antenna .................................... 194
12.11
Flat-Face flange ........................................................................................................................ 197
12.12
Process connection tag (pressure rated versions).................................................................... 200
A
Appendix A: Technical reference .......................................................................................................... 201
A.1
Principles of operation ............................................................................................................... 201
A.2
Echo processing ........................................................................................................................ 202
A.2.1
Process Intelligence .................................................................................................................. 202
A.2.2
Echo Selection .......................................................................................................................... 203
A.2.3
CLEF Range ............................................................................................................................. 206
A.2.4
Echo Threshold ......................................................................................................................... 206
A.2.5
Echo Lock.................................................................................................................................. 206
A.2.6
Auto False Echo Suppression ................................................................................................... 207
A.2.7
Measurement Range ................................................................................................................. 209
A.2.8
Measurement Response ........................................................................................................... 209
A.2.9
Damping .................................................................................................................................... 210
A.2.10 Loss of Echo (LOE) ................................................................................................................... 210
A.2.10.1 LOE Timer ................................................................................................................................. 210
A.2.10.2 Fail-safe Behavior ..................................................................................................................... 211
A.3
Maximum Process Temperature Chart ..................................................................................... 212
A.4
Process Pressure/Temperature Derating Curves ..................................................................... 213
A.4.1
Horn antenna ............................................................................................................................ 214
A.4.2
Flanged horn antenna ............................................................................................................... 215
A.4.3
Flanged encapsulated antenna ................................................................................................. 218
A.4.4
PVDF antenna ........................................................................................................................... 220
B
Appendix B: PROFIBUS PA profile structure ........................................................................................ 221
B.1
PROFIBUS Level Device Design .............................................................................................. 221
B.2
Block Model ............................................................................................................................... 221
B.2.1
Description of the blocks ........................................................................................................... 222
B.2.1.1 Transducer Block function groups ............................................................................................ 222
B.2.1.2 How the transducer block works: .............................................................................................. 223
B.2.1.3 Analog Input Function Blocks 1 and 2 ...................................................................................... 225
C
Appendix C: Communications via PROFIBUS ...................................................................................... 229
C.1
Device configuration .................................................................................................................. 229
C.1.1
SIMATIC PDM ........................................................................................................................... 229
C.1.1.1 Electronic Device Description ................................................................................................... 229
C.2
Network configuration ............................................................................................................... 230
C.2.1
The GSD file .............................................................................................................................. 230
C.3
Bus termination ......................................................................................................................... 230
C.4
Power demands ........................................................................................................................ 230
C.5
PROFIBUS address .................................................................................................................. 231
