Laurel Electronics Modbus Protocol For Series 2 Laureate Digital Panel Meters, Counters, Timers & DIN-Rail Transmitters - Manual (Page 2)

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1. TABLE OF CONTENTS
1. TABLE OF CONTENTS ....................................................................................................... 2
2. INTRODUCTION, MODBUS PROTOCOL ............................................................................ 3
3. MODBUS CONNECTION EXAMPLES ................................................................................. 4
4. JUMPER SETTINGS & FIELD WIRING .............................................................................. 5
5. PROGRAMMING YOUR MODBUS DEVICE........................................................................ 9
6. MODBUS PROTOCOL IMPLEMENTATION ........................................................................ 10
1. General .................................................................................................................. 10
2. Framing.................................................................................................................. 10
3. Electrical Interface ................................................................................................. 11
4. Parameters Selectable via Instrument Setup (IS) Software ................................... 11
5. Parameters Selectable via Front Panel Meter Setup............................................... 11
6. Supported Function Codes .................................................................................... 11
7. Register Numbers vs. Meter Addresses................................................................. 11
8. Supported Exception Response Codes .................................................................. 14
9. Message Formatting .............................................................................................. 14
10. Message Examples for Device Address= 01, No Parity .......................................... 15
11. Data Types Internal Registers ................................................................................ 16
12. DPM & Analog Input Transmitter Internal Register Addresses ............................. 17
13. Counter / Timer Internal Register Addresses ......................................................... 23
7. WARRANTY ...................................................................................................................... 32