Connect Chauvin Arnoux 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 Chauvin Arnoux logging and read.
Do you not know the meter address? Scan the device address online
Chauvin Arnoux (MD45,MD100) - MODBUS Registers
Connection and addressing notes
- Protocol
- Modbus
- Function codes
- 03 read holding registers
- Modbus ID register
- 4003
- Baud rate register
- 4004
- Parity register
- 4011
- Word order
- Float ABCD
Registers in the map: 41. function 3 (holding registers). byte order big-endian. data types: dword, single, smallint, word.
| MODBUS offset | Description | Units | Data type | Scale |
|---|
| 16389 | Protocol version | | single | |
| 16391 | Software version | | single | |
| 16393 | Hardware version | | single | |
| 16384 | Serial number | | dword | |
| 16386 | Meter code | | word | |
| 16395 | Meter | A | smallint | |
| 16397 | S0 output rate | imp/kWh | single | |
| 16399 | Combination code | | smallint | |
| 16400 | LCD time cycle | s | word | |
| 16402 | Current direction | | word | |
| 16405 | Error code | | smallint | |
| 16406 | Power down counter | | smallint | |
| 16407 | Present quadrant | | smallint | |
| 16413 | Active status word | | dword | |
| 20480 | Voltage | | single | |
| 20488 | Grid frequency | Hz | single | |
| 20490 | Current | A | single | |
| 20498 | Total active power | kW | single | |
| 20506 | Total reactive power | kvar | single | |
| 20514 | Total apparent power | kVA | single | |
| 20522 | Power factor | | single | |
| 24576 | Total active energy | kWh | single | |
| 24578 | T1 total active energy | kWh | single | |
| 24580 | T2 total active energy | kWh | single | |
| 24588 | Forward active energy | kWh | single | |
| 24590 | T1 forward active energy | kWh | single | |
| 24592 | T2 forward active energy | kWh | single | |
| 24600 | Reverse active energy | kWh | single | |
| 24602 | T1 reverse active energy | kWh | single | |
| 24604 | T2 reverse active energy | kWh | single | |
| 24612 | Total reactive energy | kvarh | single | |
| 24614 | T1 total reactive energy | kvarh | single | |
| 24616 | T2 total reactive energy | kvarh | single | |
| 24624 | Forward reactive energy | kvarh | single | |
| 24626 | TI forward reactive energy | kvarh | single | |
| 24628 | T2 forward reactive energy | kvarh | single | |
| 24636 | Reverse reactive energy | kvarh | single | |
| 24638 | T1 reverse reactive energy | kvarh | single | |
| 24640 | T2 reverse reactive energy | kvarh | single | |
| 24648 | Tariff | | smallint | |
| 24649 | Resettable day counter | kWh | single | |
Chauvin Arnoux (MEMO P200) - MODBUS Measurements
Connection and addressing notes
- Protocol
- Modbus RTU
- Data bits
- 8
- RTU framing
- 8-bit bytes, least significant bit first, 2-byte CRC
- Parity options
- even, odd, none
- Data format
- 32-bit IEEE 754 floats, big endian byte order (4-3-2-1), most significant register first (default)
- Baud rates
- 2400, 4800, 9600, 19200, 38400
- Function 04
- reads all parameters
- Read length
- every read request must ask for an even number of registers
Registers in the map: 121 (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 |
|---|
| 0 | Phase 1 voltage line neutral | V | single | |
| 2 | Phase 2 voltage line neutral | V | single | |
| 4 | Phase 3 voltage line neutral | V | single | |
| 6 | Phase 1 current | A | single | |
| 8 | Phase 2 current | A | single | |
| 10 | Phase 3 current | A | single | |
| 12 | Phase 1 active power | W | single | |
| 14 | Phase 2 active power | W | single | |
| 16 | Phase 3 active pOWCr | W | single | |
| 18 | Phase 1 apparent power | VA | single | |
| 20 | Phase 2 apparent power | VA | single | |
| 22 | Phase 3 apparent power ( | VA | single | |
| 24 | Phase 1 reactive power | var | single | |
| 26 | Phase 2 reactive power | var | single | |
| 28 | Phase 3 reactive power | var | single | |
| 30 | Phase 1 power factor | | single | |
| 32 | Phase 2 power factor | | single | |
| 34 | Phase 3 power factor | | single | |
| 36 | Phase 1 phase angle | deg | single | |
| 38 | Phase 2 phase angle | deg | single | |
| 40 | Phase 3 phase angle | deg | single | |
| 42 | Average line neutral voltage | V | single | |
| 46 | Average line current | A | single | |
| 48 | Sum of line currents | A | single | |
| 52 | Total system active power | W | single | |
| 56 | Total system apparent power | VA | single | |
| 60 | Total system reactive power | var | single | |
| 62 | Total system power factor | | single | |
| 66 | Total system phase angle | | single | |
| 70 | Frequency | Hz | single | |
| 72 | Import active energy | kWh | single | |
| 74 | Export active energy | kWh | single | |
| 76 | Import reactive energy | kvarh | single | |
| 78 | Export reactive energy | kvarh | single | |
| 80 | Total apparent energy | kVAh | single | |
| 82 | Total cumulated current | Ah | single | |
| 84 | System active power demand total | | single | |
| 86 | Max total system active power demand | | single | |
| 100 | Total system apparent power demand | VA | single | |
| 102 | Max total system apparent power demand | VA | single | |
| 104 | Neutral current demand max neutral | A | single | |
| 106 | Current demand line to line voltage (Volts) | A | single | |
| 200 | Line 1 to line 2 voltage | V | single | |
| 202 | Line 2 to line 3 voltage | V | single | |
| 204 | Voltage line 3 to line 1 | V | single | |
| 206 | Voltage average line to line | V | single | |
| 224 | Neutral current | A | single | |
| 234 | Phase 1 L/N voltage THD | % | single | |
| 236 | Phase 2 L/N voltage THD | % | single | |
| 238 | Phase 3 L/N voltage THD | % | single | |
This is not the complete map: 50 of 121 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
Cewe (Prometer)
Celsa (TNM 35,TNM 96,TNM 144,TNM 300)
Chint Instrument (DDSU666-H)
Chint Power (CPS)
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.
