User's Manual

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