Connect Selec to the computer through a USB-to-serial or RS485 adapter and read its registers in your browser: click "Read register values online" under the model (Chrome or Edge, nothing to install). The tables below list the MODBUS offset, unit, data type and scale of every register shown.
For logging 24/7 into a database, CSV files or Excel, use the Advanced Serial Data Logger (for MODBUS RTU) or Advanced TCP/IP Data Logger (for MODBUS TCP): they poll the complete map of every model on this page and provide continuous Selec modbus logging and log.
Do you not know the meter address? Scan the device address online
Selec (EM2M-1P) - Measurement Data
Connection and addressing notes
- Protocol
- Modbus
- Interface
- RS-485
- Default baud rate
- 9600 bps
- Baud rate options
- 9600 or 19200 selectable
- Stop bits
- 1
- Parity
- None
- Default device address
- 1
- Default password
- 1000
- Device address range
- 1 to 255
- Measured values
- 3xxxx input registers (30001 and up, 0-based offset = 3xxxx minus 30001)
- 32-bit float values
- two registers per value
- Configuration password range
- 0000 to 9998
Registers in the map: 24. function 4 (input registers). byte order big-endian. data types: single.
| MODBUS offset | Description | Units | Data type | Scale |
|---|
| 0 | Total active energy | W | single | |
| 2 | Import active energy | | single | |
| 4 | Export active energy | | single | |
| 6 | Total reactive energy | | single | |
| 8 | Import reactive energy | | single | |
| 10 | Export reactive energy | | single | |
| 12 | Apparent energy | | single | |
| 14 | Active power | | single | |
| 16 | Reactive power | | single | |
| 18 | Apparent power | | single | |
| 20 | Voltage L-N | B | single | |
| 22 | Current | A | single | |
| 24 | Power factor | | single | |
| 26 | Frequency | Hz | single | |
| 28 | Max demand active power | W | single | |
| 30 | Max demand reactive power | | single | |
| 32 | Max demand apparent power | | single | |
| 149 | Total | kWh | single | |
| 150 | Import | kWh | single | |
| 151 | Export | kWh | single | |
| 152 | Total | kvarh | single | |
| 153 | Import | kvarh | single | |
| 154 | Export | kvarh | single | |
| 155 | kVAh | kVAh | single | |
Selec (MFM374) - MODBUS Maps
Connection and addressing notes
- Protocol
- Modbus
- Measured values
- 3xxxx input registers (30000 and up, 0-based offset = address minus 30000)
- 32-bit float values
- two registers per value
- Settings
- 4xxxx holding registers
- Password register
- 40000
Registers in the map: 35. function 4 (input registers). function 3 (input registers). byte order big-endian. data types: single, word.
| MODBUS offset | Description | Units | Data type | Scale |
|---|
| 0 | Voltage v1n | | single | |
| 2 | Voltage v2n | | single | |
| 4 | Voltage v3n | | single | |
| 6 | Average voltage ln | | single | |
| 8 | Voltage V12 | | single | |
| 10 | Voltage V23 | | single | |
| 12 | Voltage V31 | | single | |
| 14 | Average voltage ll | | single | |
| 16 | Current I1 | | single | |
| 18 | Current I2 | | single | |
| 20 | Current I3 | | single | |
| 22 | Average current | | single | |
| 24 | kW1 | | single | |
| 26 | kW2 | | single | |
| 28 | kW3 | | single | |
| 30 | Kva1 | | single | |
| 32 | Kva2 | | single | |
| 34 | Kva3 | | single | |
| 36 | Kvar1 | | single | |
| 38 | Kvar2 | | single | |
| 40 | Kvar3 | | single | |
| 42 | Total | kW | single | |
| 44 | Total | kVA | single | |
| 46 | Total | kvar | single | |
| 48 | PF1 | | single | |
| 50 | PF2 | | single | |
| 52 | PF3 | | single | |
| 54 | Average pf | | single | |
| 56 | Frequency | | single | |
| 58 | Kwh | | single | |
| 60 | Kvah | | single | |
| 62 | Kvarh | | single | |
| 1 | Nm selection | | word | |
| 3 | Ct primary (ct secondary = 5) | | word | |
| 5 | Pt primary | | word | |
Selec (MFM383A) - MODBUS Registers Map
Connection and addressing notes
- Measured values
- 3xxxx input registers (30000 and up, 0-based offset = address minus 30000)
- 32-bit float values
- two registers per value
- Access
- read only
Registers in the map: 27. function 4 (input registers). byte order big-endian. data types: single.
| MODBUS offset | Description | Units | Data type | Scale |
|---|
| 0 | Voltage v1n | | single | |
| 2 | Voltage v2n | | single | |
| 6 | Average voltage ln | | single | |
| 8 | Voltage V12 | | single | |
| 14 | Average voltage ll | | single | |
| 16 | Current 11 | | single | |
| 18 | Current 12 | | single | |
| 20 | Current I3 | | single | |
| 22 | Average current | | single | |
| 24 | kW1 | | single | |
| 26 | kW2 | | single | |
| 28 | kW3 | | single | |
| 30 | Kva1 | | single | |
| 32 | Kva2 | | single | |
| 34 | Kva3 | | single | |
| 36 | Kvar1 | | single | |
| 38 | Kvar2 | | single | |
| 40 | Kvar3 | | single | |
| 42 | Total | kW | single | |
| 44 | Total | kVA | single | |
| 46 | Total | kvar | single | |
| 48 | PF1 | | single | |
| 50 | PF2 | | single | |
| 52 | PF3 | | single | |
| 54 | Average pf | | single | |
| 56 | Frequency | | single | |
| 58 | Kwh | | single | |
Selec (MFM384) - MODBUS Mapping
Connection and addressing notes
- Protocol
- Modbus
- Measured values
- 3xxxx input registers (30000 and up, 0-based offset = address minus 30000)
- 32-bit float values
- two registers per value
- Settings
- 4xxxx holding registers
- Password register
- 40000, range 0 to 9998
- Slave ID register
- 40007, range 1 to 255
- Baud rate register
- 40008, 0 = 300, 1 = 600, 2 = 1200, 3 = 2400, 4 = 4800, 5 = 9600, 6 = 19200
- Parity register
- 40009, 0 = none, 1 = odd, 2 = even
- Stop bits register
- 40010, 0 = 1, 1 = 2
Registers in the map: 40. function 4 (input registers). function 3 (holding registers). byte order big-endian. data types: single, word.
| MODBUS offset | Description | Units | Data type | Scale |
|---|
| 0 | Voltage v1n | | single | |
| 2 | Voltage v2n | | single | |
| 4 | Voltage v3n | | single | |
| 6 | Average voltage ln | | single | |
| 8 | Voltage V12 | | single | |
| 10 | Voltage V23 | | single | |
| 12 | Voltage V31 | | single | |
| 14 | Average voltage ll | | single | |
| 16 | Current I1 | | single | |
| 18 | Current I2 | | single | |
| 20 | Current I3 | | single | |
| 22 | Average current | | single | |
| 24 | kW1 | | single | |
| 26 | kW2 | | single | |
| 28 | kW3 | | single | |
| 30 | Kva1 | | single | |
| 32 | Kva2 | | single | |
| 34 | Kva3 | | single | |
| 36 | Kvar1 | | single | |
| 38 | Kvar2 | | single | |
| 40 | Kvar3 | | single | |
| 42 | Total | kW | single | |
| 44 | Total | kVA | single | |
| 46 | Total | kvar | single | |
| 48 | PF1 | | single | |
| 50 | PF2 | | single | |
| 52 | PF3 | | single | |
| 54 | Average pf | | single | |
| 56 | Frequency | | single | |
| 58 | Kwh | | single | |
| 60 | Kvah | | single | |
| 62 | Kvarh | | single | |
| 64 | Kw max active power | | single | |
| 66 | Kw min active power | | single | |
| 68 | Kvar max reactive power | | single | |
| 70 | Kvar min reactive power | | single | |
| 72 | Kva max apparent power | | single | |
| 1 | Nm selection | | word | |
| 3 | Ct primary (ct secondary = 5) | | word | |
| 5 | Pt primary | | word | |
Selec (MRJ4M) - MODBUS Registers Map
Connection and addressing notes
- Protocol
- Modbus
- Measured values
- 3xxxx input registers (30000 and up, 0-based offset = address minus 30000)
- 32-bit float values
- two registers per value
- 4-byte value byte order
- the LSB is at the lower address and the MSB at the higher address
Registers in the map: 65 (the first 50 are listed below; the browser reader and the data loggers use the complete map). function 4 (input registers). byte order big-endian. data types: single, string(4).
| MODBUS offset | Description | Units | Data type | Scale |
|---|
| 132 | Serial no | | string(4) | |
| 0 | Voltage V1N | V | single | |
| 2 | Voltage V2N | V | single | |
| 4 | Voltage V3N | V | single | |
| 6 | Average voltage LN | V | single | |
| 8 | Voltage V12 | V | single | |
| 10 | Voltage V23 | V | single | |
| 12 | Voltage V31 | V | single | |
| 14 | Average voltage LL | V | single | |
| 74 | Current I1 | A | single | |
| 76 | Current I2 | A | single | |
| 78 | Current I3 | A | single | |
| 80 | Average current | A | single | |
| 82 | kW1 | kW | single | |
| 84 | kW2 | kW | single | |
| 86 | kW3 | kW | single | |
| 88 | kVA1 | kVA | single | |
| 90 | kVA2 | kVA | single | |
| 92 | kVA3 | kVA | single | |
| 94 | kVAr1 | kvar | single | |
| 96 | kVAr2 | kvar | single | |
| 98 | kVAr3 | kvar | single | |
| 100 | Total | kW | single | |
| 102 | Total | kVA | single | |
| 104 | Total | kvar | single | |
| 106 | PFI | | single | |
| 108 | PF2 | | single | |
| 110 | PF3 | | single | |
| 112 | Average | PF | single | |
| 114 | Frequency | Hz | single | |
| 116 | kWh | kWh | single | |
| 120 | kVArh | kvarh | single | |
| 122 | kW MAX active power | kW | single | |
| 130 | kVA MAX apparent power | kVA | single | |
| 142 | Total kWh (Load 1 and load 2) | kWh | single | |
| 144 | Total kVArh (Load 1 and load 2) | kvarh | single | |
| 146 | Existing kW MAX active power | kW | single | |
| 148 | Existing kVA MAX apperant power | kVA | single | |
| 16 | Current I1 | A | single | |
| 18 | Current I2 | A | single | |
| 20 | Current I3 | A | single | |
| 22 | Average current | A | single | |
| 24 | kW1 | kW | single | |
| 26 | KW2 | kw | single | |
| 28 | kW3 | kW | single | |
| 30 | kVAI | kVA | single | |
| 32 | kVA2 | kVA | single | |
| 34 | kVA3 | kVA | single | |
| 36 | kVAr1 | kvar | single | |
| 38 | kVAr2 | kvar | single | |
This is not the complete map: 50 of 65 registers are listed above. Click "Read register values online" to read any register of your device in the browser, or download the program to log the complete map.
Related MODBUS registers maps
MODBUS Maps Index
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Note: Products and companies mentioned here are used only for definition and identification purposes and can be trademarks and/or registered trademarks of the respective companies.
