IME Nemo 96HD/HD+ meter (needs IF96001 RS485 module)

Register map(s) for this device, with a note of how far each has been checked. Addresses are 0-based, as on the wire. Scale and byte order are confirmed only at the hardware-verified rung.

coherence-checked

Round-trips through a real Modbus stack with no overlapping addresses and a word-order-sensitive codec — the map is internally coherent and wire-decodable. Does NOT prove byte-order or scaling match a real device: the emulator is seeded from the map's own types, so a uniformly wrong byte-order still round-trips. Only hardware-verified confirms byte-order/scale on the wire.

point	address (0-based)	type	scale	unit
Current transformer ratio (KTA)	256	U16	1
Voltage transformer ratio (KTV)	258	U16	0.1
Device configuration	260	U32BE	1
Voltage transformer ratio (KTV)	262	U16	0.01
Device identifier	768	U16	1
Phase 1 : phase voltage	769	U32BE	1	mV
Phase 2 : phase voltage	773	U32BE	1	mV
Phase 3 : phase voltage	777	U32BE	1	mV
Phase 1 : current	781	U32BE	1	mA
Phase 2 : current	785	U32BE	1	mA
Phase 3 : current	789	U32BE	1	mA
3-phase : active power	793	U32BE	1
3-phase : reactive power	797	U32BE	1
3-phase : apparent power	801	U32BE	1
3-phase : positive active energy	805	U32BE	1
Chained voltage : L1-L2	809	U32BE	1	mV
Chained voltage : L2-L3	813	U32BE	1	mV
Chained voltage : L3-L1	817	U32BE	1	mV
3-phase : negative active energy	821	U32BE	1
Frequency	825	U16	0.1	Hz
Operating timer counter	827	U16	1	h
3-phase : power factor	829	I16	0.01
3-phase : sector of power factor	831	U16	1
Voltages sequence diagnostic	832	U16	1
Output relay status	833	U16	1
3-phase : positive reactive energy	835	U32BE	1
3-phase : sign of active power	839	U16	1
3-phase : negative reactive energy	840	U32BE	1
3-phase : sign of reactive power	844	U16	1
3-phase : average power	848	U32BE	1
3-phase : peak maximum demand	852	U32BE	1
Time counter for average power	856	U16	1	minutes
Neutral current	857	U32BE	1	mA
Phase 1 : active power	861	U32BE	1
Phase 2 : active power	865	U32BE	1
Phase 3 : active power	869	U32BE	1
Phase 1 : sign of active power	873	U16	1
Phase 2 : sign of active power	874	U16	1
Phase 3 : sign of active power	875	U16	1
Phase 1 : reactive power	876	U32BE	1
Phase 2 : reactive power	880	U32BE	1
Phase 3 : reactive power	884	U32BE	1
Phase 1 : sign of reactive power	888	U16	1
Phase 2 : sign of reactive power	889	U16	1
Phase 3 : sign of reactive power	890	U16	1
Phase 1 : apparent power	891	U32BE	1
Phase 2 : apparent power	895	U32BE	1
Phase 3 : apparent power	899	U32BE	1
Phase 1 : power factor	903	I16	0.01
Phase 2 : power factor	905	I16	0.01
Phase 3 : power factor	907	I16	0.01
Phase 1 : power factor sector	909	U16	1
Phase 2 : power factor sector	910	U16	1
Phase 3 : power factor sector	911	U16	1
Phase 1 : THD V1	912	U16	1	%
Phase 2 : THD V2	914	U16	1	%
Phase 3 : THD V3	916	U16	1	%
Phase 1 : THD I1	918	U16	1	%
Phase 2 : THD I2	920	U16	1	%
Phase 3 : THD I3	922	U16	1	%
Phase 1 : I1 average	924	U32BE	1	mA
Phase 2 : I2 average	928	U32BE	1	mA
Phase 3 : I3 average	932	U32BE	1	mA
Phase 1 : I1 peak maximum	936	U32BE	1	mA
Phase 2 : I2 peak maximum	940	U32BE	1	mA
Phase 3 : I3 peak maximum	944	U32BE	1	mA
(I1+I2+I3)/3	948	U32BE	1	mA
Phase 1 : V1 min	952	U32BE	1	mV
Phase 2 : V2 min	956	U32BE	1	mV
Phase 3 : V3 min	960	U32BE	1	mV
Phase 1 : V1 max	964	U32BE	1	mV
Phase 2 : V2 max	968	U32BE	1	mV
Phase 3 : V3 max	972	U32BE	1	mV
3-phase : active partial energy	976	U32BE	1
3-phase : reactive partial energy	980	U32BE	1
3-phase : active average power	984	U32BE	1
3-phase : reactive average power	988	U32BE	1
3-phase : apparent average power	992	U32BE	1
3-phase : active PMD power	996	U32BE	1
3-phase : reactive PMD power	1000	U32BE	1
3-phase : apparent PMD power	1004	U32BE	1
Pulse counting 1 on IO Module	1008	U32BE	1
Pulse counting 2 on IO Module	1012	U32BE	1
Pulse counting 3 on IO Module / Temperature First Channel	1016	U32BE	0.01	°C
Pulse counting 4 on IO Module / Temperature Second Channel	1020	U32BE	0.01	°C
Status of input 1 on IO Module	1024	U16	1
Status of input 2 on IO Module	1025	U16	1
Status of input 3 on IO Module / Sign Temperature First Channel	1026	U16	1
Status of input 4 on IO Module / Sign Temperature Second Channel	1027	U16	1
Code to reset one Pulse Counting	1296	U16	1
Phase 1 : phase voltage	4096	U32BE	1	mV
Phase 2 : phase voltage	4098	U32BE	1	mV
Phase 3 : phase voltage	4100	U32BE	1	mV
Phase 1 : current	4102	U32BE	1	mA
Phase 2 : current	4104	U32BE	1	mA
Phase 3 : current	4106	U32BE	1	mA
Neutral current	4108	U32BE	1	mA
Chained voltage : L1-L2	4110	U32BE	1	mV
Chained voltage : L2-L3	4112	U32BE	1	mV
Chained voltage : L3-L1	4114	U32BE	1	mV
3-phase : active power	4116	U32BE	1
3-phase : reactive power	4118	U32BE	1
3-phase : apparent power	4120	U32BE	1
3-phase : sign of active power	4122	U16	1
3-phase : sign of reactive power	4123	U16	1
3-phase : positive active energy	4124	U32BE	1
3-phase : positive reactive energy	4126	U32BE	1
3-phase : negative active energy	4128	U32BE	1
3-phase : negative reactive energy	4130	U32BE	1
3-phase : power factor	4132	I16	0.01
3-phase : sector of power factor	4133	U16	1
Frequency	4134	U16	0.1	Hz
3-phase : average power	4135	U32BE	1
3-phase : peak maximum demand	4137	U32BE	1
Time counter for average power	4139	U16	1	minutes
Phase 1 : active power	4140	U32BE	1
Phase 2 : active power	4142	U32BE	1
Phase 3 : active power	4144	U32BE	1
Phase 1 : sign of active power	4146	U16	1
Phase 2 : sign of active power	4147	U16	1
Phase 3 : sign of active power	4148	U16	1
Phase 1 : reactive power	4149	U32BE	1
Phase 2 : reactive power	4151	U32BE	1
Phase 3 : reactive power	4153	U32BE	1
Phase 1 : sign of reactive power	4155	U16	1
Phase 2 : sign of reactive power	4156	U16	1
Phase 3 : sign of reactive power	4157	U16	1
Phase 1 : apparent power	4158	U32BE	1
Phase 2 : apparent power	4160	U32BE	1
Phase 3 : apparent power	4162	U32BE	1
Phase 1 : power factor	4164	I16	0.01
Phase 2 : power factor	4165	I16	0.01
Phase 3 : power factor	4166	I16	0.01
Phase 1 : power factor sector	4167	U16	1
Phase 2 : power factor sector	4168	U16	1
Phase 3 : power factor sector	4169	U16	1
Phase 1 : THD V1	4170	U16	0.1	%
Phase 2 : THD V2	4171	U16	0.1	%
Phase 3 : THD V3	4172	U16	0.1	%
Phase 1 : THD I1	4173	U16	0.1	%
Phase 2 : THD I2	4174	U16	0.1	%
Phase 3 : THD I3	4175	U16	0.1	%
Phase 1 : I1 average	4176	U32BE	1	mA
Phase 2 : I2 average	4178	U32BE	1	mA
Phase 3 : I3 average	4180	U32BE	1	mA
Phase 1 : I1 peak maximum	4182	U32BE	1	mA
Phase 2 : I2 peak maximum	4184	U32BE	1	mA
Phase 3 : I3 peak maximum	4186	U32BE	1	mA
(I1+I2+I3)/3	4188	U32BE	1	mA
Phase 1 : V1 min	4190	U32BE	1	mV
Phase 2 : V2 min	4192	U32BE	1	mV
Phase 3 : V3 min	4194	U32BE	1	mV
Phase 1 : V1 max	4196	U32BE	1	mV
Phase 2 : V2 max	4198	U32BE	1	mV
Phase 3 : V3 max	4200	U32BE	1	mV
3-phase : active partial energy	4202	U32BE	1
3-phase : reactive partial energy	4204	U32BE	1
Operating timer counter	4206	U16	1	H
Output relay status	4207	U16	1
3-phase : active average power	4208	U32BE	1
3-phase : reactive average power	4210	U32BE	1
3-phase : apparent average power	4212	U32BE	1
3-phase : active PMD power	4214	U32BE	1
3-phase : reactive PMD power	4216	U32BE	1
3-phase : apparent PMD power	4218	U32BE	1
Signed temperature First Channel	4352	I16	1	°C
Signed temperature Second Channel	4353	I16	1	°C
Current transformer ratio (KTA)	4608	U16	1
Voltage transformer ratio (KTV)	4609	U16	0.1
Device configuration	4610	U32BE	1
Device identifier	4612	U16	1
Voltages sequence diagnostic	4613	U16	1
RFU	4614	U16	1
Voltage transformer ratio (KTV)	4615	U16	0.01
Low Positive Active Energy	5376	U32BE	1
High Positive Active Energy	5378	U32BE	1
Low Positive Reactive Energy	5380	U32BE	1
High Positive Reactive Energy	5382	U32BE	1
Low Negative Active Energy	5384	U32BE	1
High Negative Active Energy	5386	U32BE	1
Low Negative Reactive Energy	5388	U32BE	1
High Negative Reactive Energy	5390	U32BE	1
Low Partial Active Energy	5392	U32BE	1
High Partial Active Energy	5394	U32BE	1
Low Partial Reactive Energy	5396	U32BE	1
High Partial Reactive Energy	5398	U32BE	1
Signed Total Active Power	5400	I32BE	1
Signed Total Reactive Power	5402	I32BE	1
Signed Phase1 Active Power	5404	I32BE	1
Signed Phase2 Active Power	5406	I32BE	1
Signed Phase3 Active Power	5408	I32BE	1
Signed Phase1 Reactive Power	5410	I32BE	1
Signed Phase2 Reactive Power	5412	I32BE	1
Signed Phase3 Reactive Power	5414	I32BE	1
Signed Total Power Factor	5416	I32BE	0.01
Signed Phase1 Power Factor	5418	I32BE	0.01
Signed Phase2 Power Factor	5420	I32BE	0.01
Signed Phase3 Power Factor	5422	I32BE	0.01
Apparent power	5424	U32BE	1
Average active power	5426	U32BE	1
Average reactive power	5428	U32BE	1
Average apparent power	5430	U32BE	1
Max active power	5432	U32BE	1
Max reactive power	5434	U32BE	1
Max apparent power	5436	U32BE	1
W1 : custom page – line 1	8192	U16	1
W2 : custom page – line 2	8193	U16	1
W3 : custom page – line 3	8194	U16	1
W4 : wiring	8195	U16	1
W5 : average maximum demand calculation	8196	U16	1
W6 : display contrast	8197	U16	1
W7 : backlight intensity	8198	U16	1
W8 : rated current	8199	U16	1
Programming parameters of Module on SLOT 1	8448	U16	1
Programming parameters of Module on SLOT 2	8704	U16	1
Programming parameters of Module on SLOT 3	8960	U16	1
Reset Word	9216	U16	1
Saving in EEPROM parameters changed by Remote commands	9728	U16	1
Enable Remote Writing Operation (master Unlock Key)	9984	U16	1
Load previous setup parameters stored in EEPROM	10240	U16	1
To set relays on LOCAL or REMOTE control	12544	U16	1
To open or close relays on IO Module	12800	U16	1

link settings as documented (unverified): RTU; FC 03,16; MODBUS / JBUS compatible. Up to 255 different instruments can be managed by the protocol.

bench facts as documented (unverified)

terminals	2-wire
wiring notes	EIA-RS485 standard in half-duplex modality. Only 32 instruments can be attached on the same physical line (master included).
max registers/read	120
broadcast	supported
protocol notes	Variables or groups of variables may be required up to 100 BYTES (sw. version < 1.09) or up to 240 BYTES (sw. version >= 1.09).
identification notes	Device identifier register at 0x300 (value 0x10) or 0x1204 (value 0x10).
doc revision	B
firmware applicability	3.18

field reports — community-sourced, unverified (checked 2026-06-11)

confirmed: comms framing: RTU, function codes: 3, 16, stop bits: 1 — confirmed by Rayleigh Instruments Nemo 96HD/HD+ MODBUS manual (PR 106 rev. 4) [1.2.7]
confirmed: Device identifier register at 0x300 (value 0x10) or 0x1204 (value 0x10) — confirmed by Rayleigh Instruments Nemo 96HD/HD+ MODBUS manual (PR 106 rev. 4)
confirmed: EIA-RS485 standard in half-duplex modality. Only 32 instruments can be attached on the same physical line (master included). — confirmed by Rayleigh Instruments Nemo 96HD/HD+ MODBUS manual (PR 106 rev. 4)
confirmed: Variables or groups of variables may be required up to 100 BYTES (sw. version < 1.09) or up to 240 BYTES (sw. version >= 1.09). — confirmed by BTicino/Legrand COMMUNICATION MODBUS PROTOCOL MF96001 / 021 NEMO 96HD manual
confirmed: Register map addresses (e.g., phase_1_phase_voltage @ 769, phase_1_current @ 781, three_phase_active_power @ 793) — confirmed by BTicino/Legrand COMMUNICATION MODBUS PROTOCOL MF96001 / 021 NEMO 96HD manual (where 0x301 = 769, 0x30d = 781, 0x319 = 793)

The trust ladder

Each rung states what it proved and what it did not. Gray until proven; green is earned by hardware only.

generated — A prompt produced it. Unproven — anyone can regenerate this.
structure-verified — Decode path is structurally sound (addresses, widths, finite values). Does NOT prove word order or scaling.
coherence-checked — Round-trips through a real Modbus stack with no overlapping addresses and a word-order-sensitive codec — the map is internally coherent and wire-decodable. Does NOT prove byte-order or scaling match a real device: the emulator is seeded from the map's own types, so a uniformly wrong byte-order still round-trips. Only hardware-verified confirms byte-order/scale on the wire.
hardware-verified (software-key) x1 — Matched a real device with operator-attested readings as ground truth — the only rung that confirms word order + scaling on the wire.

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