Siemens SITRANS F M MAGFLO series - Default Chapter; Table of Contents

Modbus RTU RS-485
2
SFIDK.PS.023.D2.02
Contents 1. Introduction .................................................................................................................... 3
1.1 Definitions and Abbreviations ........................................................................................ 3
1.2 References ..................................................................................................................... 3
2. Technical data ................................................................................................................4
2.1 General Modbus RTU .................................................................................................... 5
3. Installation ...................................................................................................................... 6
3.1 Add-on module .............................................................................................................. 6
3.2 General electrical information ........................................................................................ 7
3.3 USM II connections ........................................................................................................ 7
3.4 RS-485 termination ........................................................................................................ 7
3.4.1 RS-485 cabling .............................................................................................................. 7
4. Commissioning .............................................................................................................. 8
4.1 Effect of changing Modbus communication settings ..................................................... 8
4.2 Modbus RTU display menu ........................................................................................... 9
4.3 Menu item explanation ................................................................................................ 10
5. Modbus addressing model .......................................................................................... 11
5.1 Modbus function codes ................................................................................................ 11
6. Modbus holding registers ............................................................................................ 13
6.1 Process data ................................................................................................................ 14
6.2 Modbus driver settings ................................................................................................. 14
6.3 Modbus application settings ........................................................................................ 15
6.4 Basic settings ...............................................................................................................16
6.5 Totalizer ........................................................................................................................ 17
6.6 Output ........................................................................................................................... 17
6.7 External input ...............................................................................................................21
6.8 Sensor characteristics .................................................................................................. 21
6.9 Product identity ............................................................................................................ 22
6.10 Service info .................................................................................................................. 22
6.11 Display settings ............................................................................................................ 23
6.12 Flowmeter status .......................................................................................................... 25
7. Modbus coils ................................................................................................................ 26
7.1 Communication settings .............................................................................................. 26
7.2 Auto zero adjust ........................................................................................................... 26
7.3 Totalizer ........................................................................................................................ 26
7.4 Batch ............................................................................................................................ 26
APPENDIX A - SI-units used in USM II products ...................................................................... 27
APPENDIX B - USM II Error Pending and Error Log ................................................................ 27
APPENDIX C - Modbus communication examples ................................................................. 28
APPENDIX D - CRC calculation .............................................................................................. 31
APPENDIX E - Exception codes .............................................................................................. 33
APPENDIX F - Run Indicator .................................................................................................... 33
APPENDIX G - Units and Point positions ................................................................................. 34
APPENDIX H - Float Definition ................................................................................................. 35