Connect Rayleigh Instruments 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 Rayleigh Instruments data logger and record.
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Rayleigh Instruments (RI-D140) - Measurement Data
Connection and addressing notes
- Protocol
- Modbus
- Byte order (4-byte data)
- LSB on the lower address, MSB on the higher address
- Data format
- 2 registers per value
- Register addressing
- 3xxxx with a hex offset column (30000 = 0x00)
Registers in the map: 15. function 4 (input registers). byte order big-endian. data types: single.
| MODBUS offset | Description | Units | Data type | Scale |
|---|
| 0 | Voltage 1st phase | V | single | |
| 2 | Voltage 2nd phase | V | single | |
| 4 | Voltage 3rd phase | 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 | |
| 16 | Current I1 | A | single | |
| 18 | Current I2 | A | single | |
| 20 | Current I3 | A | single | |
| 22 | Average current | A | single | |
| 24 | kW1 | | single | |
| 26 | kW2 | | single | |
| 28 | kW3 | | single | |
Rayleigh Instruments (RI-D35) - MODBUS Values
Connection and addressing notes
- Protocol
- Modbus
- Data format
- 2 registers per value, float data structure
- Register addressing
- 3xxxx with a hex offset column (30001 = 0x01)
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 | | 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 | V | single | |
| 22 | Current | A | single | |
| 24 | Power factor | | single | |
| 26 | Frequency | Hz | single | |
| 28 | Max demand active power | | 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 | |
Rayleigh Instruments (RI-F100) - MODBUS Mapping
Connection and addressing notes
- Protocol
- Modbus
- Register addressing
- input registers 30000-30xxx and 31000-31xxx
- Data format
- 2 registers per parameter (float)
- Byte order (3-register hex values)
- LSB at the lower address, MSB at the higher address
Registers in the map: 70 (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.
| MODBUS offset | Description | Units | Data type | Scale |
|---|
| 1 | Voltage v2n | | single | |
| 3 | Voltage v3n | | single | |
| 5 | Average voltage ln | | single | |
| 7 | Voltage V12 | | single | |
| 9 | Voltage V23 | | single | |
| 11 | Voltage V31 | | single | |
| 13 | Average voltage ll | | single | |
| 15 | Current I1 | | single | |
| 17 | Current I2 | | single | |
| 19 | Current I3 | | single | |
| 21 | Average current | | single | |
| 23 | kW1 | | single | |
| 25 | kW2 | | single | |
| 27 | kW3 | | single | |
| 29 | Kva1 | | single | |
| 31 | Kva2 | | single | |
| 33 | Kva3 | | single | |
| 35 | Kvar1 | | single | |
| 37 | Kvar2 | | single | |
| 39 | Kvar3 | | single | |
| 41 | Total | kW | single | |
| 43 | Total | kVA | single | |
| 45 | Total | kvar | single | |
| 47 | PF1 | | single | |
| 49 | PF2 | | single | |
| 51 | PF3 | | single | |
| 53 | Average pf | | single | |
| 55 | Frequency | | single | |
| 57 | Total net | kWh | single | |
| 59 | Total net | kVAh | single | |
| 61 | Total net | kvarh | single | |
| 63 | Kw max active power | | single | |
| 65 | Kw min active power | | single | |
| 67 | Kvar max reactive power | | single | |
| 69 | Kvar min reactive power | | single | |
| 71 | Kva max apparent power | | single | |
| 73 | Max I1 demand | | single | |
| 75 | Max I2 demand | | single | |
| 77 | Max I3 demand | | single | |
| 79 | Max avg demand | | single | |
| 81 | Run hour | | single | |
| 83 | Kwh1 (imp) | | single | |
| 85 | Kwh2 (imp) | | single | |
| 87 | Kwh3 (imp) | | single | |
| 89 | Kwh1 (exp) | | single | |
| 91 | Kwh2 (exp) | | single | |
| 93 | Kwh3 (exp) | | single | |
| 95 | Total kwh (imp) | kWh | single | |
| 97 | Total kwh (exp) | kWh | single | |
| 99 | Kvarh1 (imp) | | single | |
This is not the complete map: 50 of 70 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.
Rayleigh Instruments (RI-F200) - Measurement Data
Registers in the map: 62 (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 |
|---|
| 684 | Serial number of unit | | 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 | |
| 16 | Current l1 | A | single | |
| 18 | Current I2 | A | single | |
| 20 | Current I3 | A | single | |
| 22 | Average current | A | 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 | Hz | 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 | |
| 122 | Neutral current | | single | |
| 124 | Thd of voltage v1n | | single | |
| 126 | Thd of voltage v2n | | single | |
| 128 | Thd of voltage v3n | | single | |
| 130 | Thd of voltage V12 | | single | |
| 132 | Thd of voltage V23 | | single | |
| 134 | Thd of voltage V31 | | single | |
| 136 | Thd of current I1 | | single | |
| 138 | Thd of current l2 | | single | |
| 140 | Thd of current l3 | | single | |
| 692 | Max l1 demand | | single | |
| 694 | Max l2 demand | | single | |
This is not the complete map: 50 of 62 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.
Rayleigh Instruments (RI-F220) - MODBUS Registers Map
Connection and addressing notes
- Protocol
- Modbus
- Register addressing
- input registers 30000-30xxx with hex addresses
- Data format
- 2 registers per parameter (float)
Registers in the map: 78 (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 |
|---|
| 684 | 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 | |
| 16 | Current I1 | A | single | |
| 18 | Current I2 | A | single | |
| 20 | Current I3 | A | single | |
| 22 | Average current | A | 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 | Hz | single | |
| 58 | Total | kWh | single | |
| 60 | Total | kVAh | single | |
| 62 | Total | kvarh | single | |
| 64 | Kw max active power | | single | |
| 66 | Kw min active power | | single | |
| 68 | Kvarh max reactive power | | single | |
| 70 | Kvarh min reactive power | | single | |
| 72 | Kva max apparent power | | single | |
| 74 | Max I1 demand | | single | |
| 76 | Max I2 demand | | single | |
| 78 | Max I3 demand | | single | |
| 80 | Max avg. I demand | | single | |
| 82 | Run hour | | single | |
| 84 | Imp kwh1 | | single | |
| 86 | Imp kwh2 | | single | |
| 88 | Imp kwh3 | | single | |
| 90 | Exp kwh1 | | single | |
| 92 | Exp kwh2 | | single | |
| 94 | Exp kwh3 | | single | |
| 96 | Total imp | kWh | single | |
This is not the complete map: 50 of 78 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.
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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.
