Eastron · Energy meter
SDM120-Modbus Modbus register map
Default configuration
- Protocol
- RS485
- Port
- 502
- Unit ID
- 1
- Addressing
- 0-based
- Byte order
- Big endian
- Word order
- High word first
- Baud rate
- 2400
- Parity
- None
- Data bits
- 8
- Stop bits
- 1
This device has an RS-485 interface. Reach it through a Modbus RTU-to-TCP gateway, configured with the factory serial settings above.
Register map
| Address | Count | Name | Type | Unit | Scale | Access |
|---|---|---|---|---|---|---|
| 0 | 2 | Voltage | Float32 | V | 1 | R |
| 6 | 2 | Current | Float32 | A | 1 | R |
| 12 | 2 | Power (Active) | Float32 | W | 1 | R |
| 18 | 2 | Power (Apparent) | Float32 | VA | 1 | R |
| 24 | 2 | Power (Reactive) | Float32 | VAr | 1 | R |
| 30 | 2 | Power Factor | Float32 | - | 1 | R |
| 36 | 2 | Phase Angle | Float32 | ° | 1 | R |
| 70 | 2 | Frequency | Float32 | Hz | 1 | R |
| 72 | 2 | Imported Energy (Active) | Float32 | kWh | 1 | R |
| 74 | 2 | Exported Energy (Active) | Float32 | kWh | 1 | R |
| 76 | 2 | Imported Energy (Reactive) | Float32 | kVArh | 1 | R |
| 78 | 2 | Exported Energy (Reactive) | Float32 | kVArh | 1 | R |
| 84 | 2 | Total Demand Power (Active) | Float32 | W | 1 | R |
| 86 | 2 | Maximum Total Demand Power (Active) | Float32 | W | 1 | R |
| 88 | 2 | Import Demand Power (Active) | Float32 | W | 1 | R |
| 90 | 2 | Maximum Import Demand Power (Active) | Float32 | W | 1 | R |
| 92 | 2 | Export Demand Power (Active) | Float32 | W | 1 | R |
| 94 | 2 | Maximum Export Demand Power (Active) | Float32 | W | 1 | R |
| 258 | 2 | Total Demand Current | Float32 | A | 1 | R |
| 264 | 2 | Maximum Total Demand Current | Float32 | A | 1 | R |
| 342 | 2 | Total Energy (Active) | Float32 | kWh | 1 | R |
| 344 | 2 | Total Energy (Reactive) | Float32 | kVArh | 1 | R |
Notes
RS-485 device: reach it through a Modbus RTU-to-TCP gateway using the factory serial settings above. Measurements are IEEE-754 Float32 values (high word first) read with function code 04; the configuration registers are read/written with function code 03.