Siemens NAN 67 Series Manual de usuario descargar pdf (Pagina 4)

iv Modbus® RTU Serial Communications User Manual 02/13

Contents

1. INTRODUCTION ................................................................................................... 1

1.1 Modbus RTU Implementation ........................................................................................................ 1

1.2 Modbus RTU Configuration Interface ........................................................................................... 1

2. MODBUS RTU MESSAGE FORMAT ................................................................... 2

2.1 Modbus RTU Link Layer ............................................................................................................... 2

2.2 Modbus RTU Data Layer ............................................................................................................... 3

2.3 IEEE 32-bit Floating-Point Register Information .......................................................................... 4

3. MODBUS RTU FUNCTION CODES ..................................................................... 9

3.1 Function Code 01 – Read Digital Output Status .......................................................................... 13

3.2 Function Code 02 – Read Digital Input Status ............................................................................. 15

3.3 Function Codes 03/04 – Read Input Registers ............................................................................. 16

3.4 Function Code 05 – Force Single Digital Output ......................................................................... 18

3.5 Function Codes 06 – Preset Single Register ................................................................................. 19

3.6 Function Code 08 – Loopback Message ...................................................................................... 20

3.7 Function Codes 16 (10h) – Preset Multiple Registers .................................................................. 21

3.8 Function Code 17 (11h) – Report Device ID ............................................................................... 22

4. MODBUS RTU EXCEPTION CODES ................................................................. 25

A. APPENDIX: REGISTER MAP ............................................................................. 27

A.1 Register Map Overview ............................................................................................................ 27

A.2 Miscellaneous Register Map ..................................................................................................... 29

A.2.1 RSX, VPR, VRX, UDC5300 Miscellaneous Register Map ............................................. 29

A.2.2 DR4300, DR4500 Chart Record Map ............................................................................... 30

A.3 Loop Value Integer Register Map ............................................................................................. 31

A.4 Loop 2 and Extended Value Integer Register Map – UDC3500 .............................................. 35

A.5 Loop Value Register Map ......................................................................................................... 38

A.6 Analog Input Value Register Map ............................................................................................ 43

A.7 Communication or Constant Value Register Map .................................................................... 44

A.7.1 Extended Comms for X Series recorders ........................................................................... 45

A.8 Math, Calculated Value, or Variable Register Map .................................................................. 46

A.9 Math or Calculated Value Status Register Map ........................................................................ 47

A.10 Totalizer Value Register Map ................................................................................................... 48

A.11 Totalizer Status Register Map ................................................................................................... 49

A.12 Shed Timer Reset Register ........................................................................................................ 50

1 2 3 4 5 6 7 8 9 ... 75 76

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Siemens NAN 67 Series Manual de usuario Pagina 4