Eastron SDM630-Modbus Modbus register map

Three-phase multifunction DIN rail energy meter, direct connection (SDM630-Modbus and SDM630-Modbus V2). Values a wiring system does not use read 0

Official
97 registers
Modbus RTU
Revision 3 · 2026-11-10
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: 12 holding registers, 85 input registers
Groups: 12
Revision: 3 · 2026-11-10
Added: 2026-10-14 (2026-10-14)
File: maps/eastron/sdm630-modbus.mbmap.json · 19 KB · history
SHA-256: 71b8491656e1c7fbae33d55c06acae0337e03e36f789cc05195ee829f287def1
Manufacturer: eastroneurope.com

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
Role	Register	Address	Type	Values
Serial number	Serial number	holding 64512	uint32 ABCD

Sources and notes

Eastron SDM630Modbus Smart Meter Modbus Protocol Implementation · version V1.8

Source: Eastron Europe, "Eastron SDM630Modbus Smart Meter Modbus Protocol Implementation V1.8"; https://www.eastroneurope.com/images/uploads/products/protocol/SDM630_MODBUS_Protocol.pdf

Eastron SDM630-Modbus three-phase energy meter (RS485).
Every value is a float32 in two registers. The meter answers FC03, FC04 and FC16 only (no FC06)
and rejects reads or writes of an odd number of registers.

Area	Address	Type	Access	Unit	Description
IR	0	float32 ABCD	R	V	Valid on 3P4W, 1P2W; reads 0 otherwise
IR	2	float32 ABCD	R	V	Valid on 3P4W; reads 0 otherwise
IR	4	float32 ABCD	R	V	Valid on 3P4W; 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 3P4W, 1P2W; reads 0 otherwise
IR	14	float32 ABCD	R	W	Valid on 3P4W, 1P2W; reads 0 otherwise
IR	16	float32 ABCD	R	W	Valid on 3P4W; reads 0 otherwise
IR	18	float32 ABCD	R	VA	Valid on 3P4W, 1P2W; 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 3P4W, 1P2W; 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		Sign follows the direction of the current: positive = forward, negative = reverse; Valid on 3P4W, 1P2W; reads 0 otherwise
IR	32	float32 ABCD	R		Sign follows the direction of the current: positive = forward, negative = reverse; Valid on 3P4W; reads 0 otherwise
IR	34	float32 ABCD	R		Sign follows the direction of the current: positive = forward, negative = reverse; Valid on 3P4W; reads 0 otherwise
IR	36	float32 ABCD	R	°	Valid on 3P4W, 1P2W; 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; reads 0 otherwise
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		Sign follows the direction of the current: positive = forward, negative = reverse
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	84	float32 ABCD	R	W	Import minus export
IR	86	float32 ABCD	R	W	Import minus export. The protocol table gives the unit as VA
IR	100	float32 ABCD	R	VA
IR	102	float32 ABCD	R	VA
IR	104	float32 ABCD	R	A	Valid on 3P4W; reads 0 otherwise
IR	106	float32 ABCD	R	A	Valid on 3P4W; reads 0 otherwise
IR	200	float32 ABCD	R	V	Valid on 3P4W, 3P3W; reads 0 otherwise
IR	202	float32 ABCD	R	V	Valid on 3P4W, 3P3W; reads 0 otherwise
IR	204	float32 ABCD	R	V	Valid on 3P4W, 3P3W; reads 0 otherwise
IR	206	float32 ABCD	R	V	Valid on 3P4W, 3P3W; reads 0 otherwise
IR	224	float32 ABCD	R	A	Valid on 3P4W; reads 0 otherwise
IR	234	float32 ABCD	R	%	Valid on 3P4W, 1P2W; reads 0 otherwise
IR	236	float32 ABCD	R	%	Valid on 3P4W; reads 0 otherwise
IR	238	float32 ABCD	R	%	Valid on 3P4W; reads 0 otherwise
IR	240	float32 ABCD	R	%
IR	242	float32 ABCD	R	%	Valid on 3P4W, 3P3W; reads 0 otherwise
IR	244	float32 ABCD	R	%	Valid on 3P4W, 3P3W; reads 0 otherwise
IR	248	float32 ABCD	R	%	Valid on 3P4W, 1P2W; reads 0 otherwise
IR	250	float32 ABCD	R	%
IR	258	float32 ABCD	R	A
IR	260	float32 ABCD	R	A	Valid on 3P4W, 3P3W; reads 0 otherwise
IR	262	float32 ABCD	R	A	Valid on 3P4W, 3P3W; reads 0 otherwise
IR	264	float32 ABCD	R	A
IR	266	float32 ABCD	R	A	Valid on 3P4W, 3P3W; reads 0 otherwise
IR	268	float32 ABCD	R	A	Valid on 3P4W, 3P3W; reads 0 otherwise
IR	334	float32 ABCD	R	%	Valid on 3P4W, 3P3W; reads 0 otherwise
IR	336	float32 ABCD	R	%	Valid on 3P4W, 3P3W; reads 0 otherwise
IR	338	float32 ABCD	R	%	Valid on 3P4W, 3P3W; reads 0 otherwise
IR	340	float32 ABCD	R	%	Valid on 3P4W, 3P3W; reads 0 otherwise
IR	342	float32 ABCD	R	kWh	Import plus export
IR	344	float32 ABCD	R	kvarh	Import plus export
IR	346	float32 ABCD	R	kWh
IR	348	float32 ABCD	R	kWh
IR	350	float32 ABCD	R	kWh
IR	352	float32 ABCD	R	kWh
IR	354	float32 ABCD	R	kWh
IR	356	float32 ABCD	R	kWh
IR	358	float32 ABCD	R	kWh	Import plus export
IR	360	float32 ABCD	R	kWh	Import plus export
IR	362	float32 ABCD	R	kWh	Import plus export
IR	364	float32 ABCD	R	kvarh
IR	366	float32 ABCD	R	kvarh
IR	368	float32 ABCD	R	kvarh
IR	370	float32 ABCD	R	kvarh
IR	372	float32 ABCD	R	kvarh
IR	374	float32 ABCD	R	kvarh
IR	376	float32 ABCD	R	kvarh	Import plus export
IR	378	float32 ABCD	R	kvarh	Import plus export
IR	380	float32 ABCD	R	kvarh	Import plus export
HR	2	float32 ABCD	RW	min	0, 5, 8, 10, 15, 20, 30 or 60 minutes, default 60. 0 makes demand show the present value and max demand the maximum since the last reset
HR	10	float32 ABCD	RW		3 = 3P4W, 2 = 3P3W, 1 = 1P2W. Needs the password
HR	12	float32 ABCD	RW	ms	60, 100 or 200 ms, default 100
HR	14	float32 ABCD	RW		Reads 0 = locked, 1 = unlocked; writing any value locks. Reading also restarts the one-minute password timeout
HR	18	float32 ABCD	RW		0 = no parity, 1 stop bit (default); 1 = even, 1 stop; 2 = odd, 1 stop; 3 = no parity, 2 stop. Takes effect after a restart
HR	20	float32 ABCD	RW		Modbus address 1 to 247, default 1. Takes effect after a restart
HR	22	float32 ABCD	RW		0 = 0.0025, 1 = 0.01, 2 = 0.1, 3 = 1, 4 = 10, 5 = 100 kWh (kvarh) per pulse
HR	24	float32 ABCD	RW		Write the password (default 0000) to unlock protected registers for one minute
HR	28	float32 ABCD	RW		0 = 2400, 1 = 4800, 2 = 9600 (default), 3 = 19200, 4 = 38400. Takes effect after a restart
HR	86	float32 ABCD	RW		1 = import active, 2 = total active, 4 = export active (default), 5 = import reactive, 6 = total reactive, 8 = export reactive
HR	61456	uint32 ABCD	W		The protocol writes 00 00 here; every Eastron write must cover an even number of registers, so this sends two zero registers with FC16
HR	64512	uint32 ABCD	R

Help improve this map

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Suggest a correctionEdit the file on GitHub; it opens a pull request.
Report a problemA wrong address, type, scale or byte order.
Read the formatWhat each key of the file means (SPEC.md).