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  3. RM3440

Rish RM3440 Modbus register map

Also covers RISH Master 3440

Rishabh RISH Master 3440 multifunction meter with RS-485 (Modbus RTU)

  • Official
  • 67 registers
  • Modbus RTU
  • Revision 2 · 2026-10-17

Official: Written from the manufacturer's documentation, but not tested on a device yet. Check the map against the manufacturer's documentation before you write to a live device. Tested it? Report a test.

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Communication

Protocol
Modbus RTU
Unit ID
1
Serial
9600 8E1 · 9600 baud, 8 data bits, even parity, 1 stop bit
Byte / word order
ABCD · bytes big-endian, words high first
Addresses
0-based

Connection values are defaults: the device may be configured differently.

Map

Registers
67 input registers
Groups
4
Revision
2 · 2026-10-17
Added
()
File
maps/rish/rm3440.mbmap.json · 12 KB · history
SHA-256
dc8a29121669ec5cd9864426043427ca02500e2ebc9b2fcbca68d3e589e57969
Manufacturer
rishabh.co.in

Sources and notes

Source: Rishabh Instruments, "RISH Master 3440 Operating Manual", Rev D

  • Measured values are float32 input registers (FC04, two registers each, most significant byte first).
  • Energies are given here without a unit because the manual table does not state it.
  • Registers valid only on some wiring systems read 0 on the others (manual table).
  • Not in this map: the energy overflow counters and cumulative values (0x006C-0x009A), whose rows are incomplete in the manual, the assignable registers and the 4X setup registers.
AreaAddressNameTypeAccessUnitScaleDescription
IR 0 float32 ABCD R V
IR 2 float32 ABCD R V Valid on 3P4W, 3P3W; reads 0 otherwise
IR 4 float32 ABCD R V Valid on 3P4W, 3P3W; reads 0 otherwise
IR 6 float32 ABCD R A
IR 8 float32 ABCD R A Valid on 3P4W, 3P3W; reads 0 otherwise
IR 10 float32 ABCD R A Valid on 3P4W, 3P3W; reads 0 otherwise
IR 12 float32 ABCD R W Valid on 1P2W, 3P4W; reads 0 otherwise
IR 14 float32 ABCD R W Valid on 3P4W; reads 0 otherwise
IR 16 float32 ABCD R W Valid on 3P4W; reads 0 otherwise
IR 18 float32 ABCD R VA Valid on 1P2W, 3P4W; reads 0 otherwise
IR 20 float32 ABCD R VA Valid on 3P4W; reads 0 otherwise
IR 22 float32 ABCD R VA Valid on 3P4W; reads 0 otherwise
IR 24 float32 ABCD R var Valid on 1P2W, 3P4W; reads 0 otherwise
IR 26 float32 ABCD R var Valid on 3P4W; reads 0 otherwise
IR 28 float32 ABCD R var Valid on 3P4W; reads 0 otherwise
IR 30 float32 ABCD R Valid on 1P2W, 3P4W; reads 0 otherwise
IR 32 float32 ABCD R Valid on 3P4W; reads 0 otherwise
IR 34 float32 ABCD R Valid on 3P4W; reads 0 otherwise
IR 36 float32 ABCD R ° Valid on 1P2W, 3P4W; reads 0 otherwise
IR 38 float32 ABCD R ° Valid on 3P4W; reads 0 otherwise
IR 40 float32 ABCD R ° Valid on 3P4W; reads 0 otherwise
IR 42 float32 ABCD R V Valid on 3P4W, 3P3W; reads 0 otherwise
IR 44 float32 ABCD R V Valid on 3P4W, 3P3W; reads 0 otherwise
IR 46 float32 ABCD R A Valid on 3P4W, 3P3W; reads 0 otherwise
IR 48 float32 ABCD R A Valid on 3P4W, 3P3W; reads 0 otherwise
IR 50 float32 ABCD R W Valid on 3P4W, 3P3W; reads 0 otherwise
IR 52 float32 ABCD R W Valid on 3P4W, 3P3W; reads 0 otherwise
IR 54 float32 ABCD R VA Valid on 3P4W, 3P3W; reads 0 otherwise
IR 56 float32 ABCD R VA Valid on 3P4W, 3P3W; reads 0 otherwise
IR 58 float32 ABCD R var Valid on 3P4W, 3P3W; reads 0 otherwise
IR 60 float32 ABCD R var Valid on 3P4W, 3P3W; reads 0 otherwise
IR 62 float32 ABCD R Valid on 3P4W, 3P3W; reads 0 otherwise
IR 64 float32 ABCD R Valid on 3P4W; reads 0 otherwise
IR 66 float32 ABCD R ° Valid on 3P4W, 3P3W; reads 0 otherwise
IR 68 float32 ABCD R ° Valid on 3P4W; reads 0 otherwise
IR 70 float32 ABCD R Hz
IR 72 float32 ABCD R
IR 74 float32 ABCD R
IR 76 float32 ABCD R
IR 78 float32 ABCD R
IR 80 float32 ABCD R
IR 82 float32 ABCD R
IR 84 float32 ABCD R W
IR 86 float32 ABCD R W
IR 88 float32 ABCD R W
IR 90 float32 ABCD R W
IR 100 float32 ABCD R VA
IR 102 float32 ABCD R VA
IR 104 float32 ABCD R A
IR 106 float32 ABCD R A
IR 196 float32 ABCD R Model code
IR 198 float32 ABCD R
IR 200 float32 ABCD R V Valid on 3P4W; reads 0 otherwise
IR 202 float32 ABCD R V Valid on 3P4W; reads 0 otherwise
IR 204 float32 ABCD R V Valid on 3P4W; reads 0 otherwise
IR 206 float32 ABCD R % Valid on 3P4W, 3P3W; reads 0 otherwise
IR 208 float32 ABCD R % Valid on 3P4W, 3P3W; reads 0 otherwise
IR 210 float32 ABCD R % Valid on 3P4W, 3P3W; reads 0 otherwise
IR 212 float32 ABCD R % Valid on 3P4W, 3P3W; reads 0 otherwise
IR 214 float32 ABCD R % Valid on 3P4W, 3P3W; reads 0 otherwise
IR 216 float32 ABCD R % Valid on 3P4W, 3P3W; reads 0 otherwise
IR 218 float32 ABCD R %
IR 220 float32 ABCD R %
IR 224 float32 ABCD R A Valid on 1P2W, 3P4W; reads 0 otherwise
IR 226 float32 ABCD R h
IR 228 float32 ABCD R h
IR 230 float32 ABCD R

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