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  3. LE-03MQ

F&F LE-03MQ Modbus register map

F&F LE-03MQ three-phase 100(5) A MID energy meter with RS-485 Modbus RTU

  • Official
  • 76 registers
  • Modbus RTU
  • Revision 2 · 2026-10-17
  • Identity: serial number

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 8N1 · 9600 baud, 8 data bits, none parity, 1 stop bit
Byte / word order
ABCD · bytes big-endian, words high first
Addresses
0-based
Max read
80 registers per request

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

Map

Registers
9 holding registers, 67 input registers
Groups
5
Revision
2 · 2026-10-17
Added
()
File
maps/ff/le-03mq.mbmap.json · 12 KB · history
SHA-256
69209cb35b818e45efd79fd7ebfac6a1288273d3c7f29717b24bde3c65cafb3b
Manufacturer
fif.com.pl

Device identity

What a tool can read to check that this map fits the connected device (SPEC.md section 4.7). Registers with a role are read like any other register.

Registers
RoleRegisterAddressTypeValues
Serial number Serial number holding 42 float32 ABCD

Sources and notes

Source: F&F Filipowski, "LE-03MQ instrukcja obsługi" (user manual, Polish), section 9

  • Measurements are float32 input registers (FC04); settings are float32 holding registers (FC03 read, FC16 write, one parameter per write).
  • At most 40 values (80 registers) per request.
  • Defaults: address 1, 9600 baud, no parity, 1 stop bit.
  • Values a wiring type does not provide read 0.
  • Corrected from the manual's table: export reactive energy is at 78 (0x4E; the table prints 0x4A) and the line-to-line voltages at 200-206 are in V (the table prints W).
  • Names and descriptions are translated from the Polish manual.
AreaAddressNameTypeAccessUnitScaleDescription
IR 0 float32 ABCD R V
IR 2 float32 ABCD R V
IR 4 float32 ABCD R V
IR 6 float32 ABCD R A
IR 8 float32 ABCD R A
IR 10 float32 ABCD R A
IR 12 float32 ABCD R W
IR 14 float32 ABCD R W
IR 16 float32 ABCD R W
IR 18 float32 ABCD R VA
IR 20 float32 ABCD R VA
IR 22 float32 ABCD R VA
IR 24 float32 ABCD R var
IR 26 float32 ABCD R var
IR 28 float32 ABCD R var
IR 30 float32 ABCD R
IR 32 float32 ABCD R
IR 34 float32 ABCD R
IR 36 float32 ABCD R °
IR 38 float32 ABCD R °
IR 40 float32 ABCD R °
IR 42 float32 ABCD R V
IR 46 float32 ABCD R A
IR 48 float32 ABCD R A
IR 52 float32 ABCD R W
IR 56 float32 ABCD R VA
IR 60 float32 ABCD R var
IR 62 float32 ABCD R Positive = capacitive load, negative = inductive
IR 66 float32 ABCD R °
IR 70 float32 ABCD R Hz
IR 72 float32 ABCD R kWh
IR 74 float32 ABCD R kWh
IR 76 float32 ABCD R kvarh
IR 78 float32 ABCD R kvarh
IR 80 float32 ABCD R kVAh
IR 82 float32 ABCD R Ah
IR 342 float32 ABCD R kWh
IR 344 float32 ABCD R kvarh
IR 84 float32 ABCD R W Import only
IR 86 float32 ABCD R W Import only
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 258 float32 ABCD R A
IR 260 float32 ABCD R A
IR 262 float32 ABCD R A
IR 264 float32 ABCD R A
IR 266 float32 ABCD R A
IR 268 float32 ABCD R A
IR 200 float32 ABCD R V
IR 202 float32 ABCD R V
IR 204 float32 ABCD R V
IR 206 float32 ABCD R V
IR 224 float32 ABCD R A
IR 234 float32 ABCD R %
IR 236 float32 ABCD R %
IR 238 float32 ABCD R %
IR 240 float32 ABCD R %
IR 242 float32 ABCD R %
IR 244 float32 ABCD R %
IR 248 float32 ABCD R %
IR 250 float32 ABCD R %
IR 334 float32 ABCD R %
IR 336 float32 ABCD R %
IR 338 float32 ABCD R %
IR 340 float32 ABCD R %
HR 0 float32 ABCD R min Minutes until the current demand value is calculated
HR 2 float32 ABCD RW min 5, 8, 10, 15, 20, 30 or 60 (default 60); 0 shows the present value
HR 10 float32 ABCD RW Needs the password (default 1000)
HR 12 float32 ABCD RW ms 60, 100 or 200 (default 200)
HR 18 float32 ABCD RW 2 = 1 stop bit, even parity; 3 = 2 stop bits, no parity. The table describes both 0 (the default) and 1 as 1 stop bit, odd parity, while the default is no parity. Takes effect after a restart
HR 20 float32 ABCD RW Default 1. Takes effect after a restart
HR 22 float32 ABCD RW 0.01, 0.1, 1, 10 or 100 kWh per pulse
HR 28 float32 ABCD RW Default 2 (9600). Takes effect after a restart
HR 42 float32 ABCD R

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