Lovato Electric RGK800 Modbus register map

Also covers RGK800SA

Generating set controller with Modbus RTU, ASCII or TCP through its ports and expansion modules

Official
166 registers
Modbus TCP and 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.

Download .mbmap.json Raw JSON View on GitHub Suggest a correction Report a problem

Communication

Protocol: Modbus TCP and RTU
Unit ID: 1
TCP port: 502default
Serial: 9600 8E1 · 9600 baud, 8 data bits, even parity, 1 stop bit defaults
Byte / word order: ABCD · bytes big-endian, words high first
Addresses: 1-based · wire address = address − 1

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

Map

Registers: 166 input registers
Groups: 6
Revision: 2 · 2026-10-17
Added: 2026-10-14 (2026-10-14)
File: maps/lovato-electric/rgk800.mbmap.json · 29 KB · history
SHA-256: 7bb917ff2f59f609adc0c5991b01b14cbbb02a9ac8dd87a6e4f609c9f72da896
Manufacturer: lovatoelectric.com

Sources and notes

RGK series Generating set controller, Modbus communication protocol · version I375IGB08_22, 2022-08-26
measure tables, rows marked for RGK800

Source: Lovato Electric, "RGK series generating set controller Modbus communication protocol", I375IGB08_22 (2022-08-26)

Addresses are the table addresses of the protocol, which are 1-based: the query uses the table address minus one.
Measurements are read with FC04; 32-bit values are high word first.
Registers that the RGK800SA lacks say so in their description.
Counters, analog inputs and outputs use the unit configured for them (UM1-UM8).
Not in this map: the maximum, minimum and average blocks (0x0200-0x0BFF), alarms, status bits, commands and setup parameters.

Area	Address	Type	Access	Unit	Scale	Description
IR	2	uint32 ABCD	R	V	×0.01	Not on RGK800SA
IR	4	uint32 ABCD	R	V	×0.01	Not on RGK800SA
IR	6	uint32 ABCD	R	V	×0.01	Not on RGK800SA
IR	8	uint32 ABCD	R	V	×0.01
IR	10	uint32 ABCD	R	V	×0.01
IR	12	uint32 ABCD	R	V	×0.01
IR	14	uint32 ABCD	R	A	×0.0001
IR	16	uint32 ABCD	R	A	×0.0001
IR	18	uint32 ABCD	R	A	×0.0001
IR	20	uint32 ABCD	R	A	×0.0001
IR	22	uint32 ABCD	R	V	×0.01	Not on RGK800SA
IR	24	uint32 ABCD	R	V	×0.01	Not on RGK800SA
IR	26	uint32 ABCD	R	V	×0.01	Not on RGK800SA
IR	28	uint32 ABCD	R	V	×0.01
IR	30	uint32 ABCD	R	V	×0.01
IR	32	uint32 ABCD	R	V	×0.01
IR	34	int32 ABCD	R	W	×0.01	Not on RGK800SA
IR	36	int32 ABCD	R	W	×0.01	Not on RGK800SA
IR	38	int32 ABCD	R	W	×0.01	Not on RGK800SA
IR	40	int32 ABCD	R	W	×0.01
IR	42	int32 ABCD	R	W	×0.01
IR	44	int32 ABCD	R	W	×0.01
IR	46	int32 ABCD	R	var	×0.01	Not on RGK800SA
IR	48	int32 ABCD	R	var	×0.01	Not on RGK800SA
IR	50	int32 ABCD	R	var	×0.01	Not on RGK800SA
IR	52	int32 ABCD	R	var	×0.01
IR	54	int32 ABCD	R	var	×0.01
IR	56	int32 ABCD	R	var	×0.01
IR	58	uint32 ABCD	R	VA	×0.01	Not on RGK800SA
IR	60	uint32 ABCD	R	VA	×0.01	Not on RGK800SA
IR	62	uint32 ABCD	R	VA	×0.01	Not on RGK800SA
IR	64	uint32 ABCD	R	VA	×0.01
IR	66	uint32 ABCD	R	VA	×0.01
IR	68	uint32 ABCD	R	VA	×0.01
IR	70	int32 ABCD	R		×0.0001	Not on RGK800SA
IR	72	int32 ABCD	R		×0.0001	Not on RGK800SA
IR	74	int32 ABCD	R		×0.0001	Not on RGK800SA
IR	76	int32 ABCD	R		×0.0001
IR	78	int32 ABCD	R		×0.0001
IR	80	int32 ABCD	R		×0.0001
IR	82	uint32 ABCD	R	V	×0.01	Not on RGK800SA
IR	84	uint32 ABCD	R	V	×0.01	Not on RGK800SA
IR	86	uint32 ABCD	R	Hz	×0.001	Not on RGK800SA
IR	88	uint32 ABCD	R	V	×0.01
IR	90	uint32 ABCD	R	V	×0.01
IR	92	uint32 ABCD	R	Hz	×0.001
IR	94	int32 ABCD	R		×0.0001	Not on RGK800SA
IR	100	int32 ABCD	R		×0.0001
IR	106	int32 ABCD	R	W	×0.01	Not on RGK800SA
IR	108	int32 ABCD	R	var	×0.01	Not on RGK800SA
IR	110	uint32 ABCD	R	VA	×0.01	Not on RGK800SA
IR	112	int32 ABCD	R	W	×0.01
IR	114	int32 ABCD	R	var	×0.01
IR	116	uint32 ABCD	R	VA	×0.01
IR	118	int32 ABCD	R	%	×0.01	Not on RGK800SA
IR	120	int32 ABCD	R	%	×0.01	Not on RGK800SA
IR	122	uint32 ABCD	R	%	×0.01	Not on RGK800SA
IR	124	int32 ABCD	R	%	×0.01
IR	126	int32 ABCD	R	%	×0.01
IR	128	uint32 ABCD	R	%	×0.01
IR	130	uint32 ABCD	R	%	×0.01	Not on RGK800SA
IR	132	uint32 ABCD	R	%	×0.01	Not on RGK800SA
IR	134	uint32 ABCD	R	%	×0.01	Not on RGK800SA
IR	136	uint32 ABCD	R	%	×0.01
IR	138	uint32 ABCD	R	%	×0.01
IR	140	uint32 ABCD	R	%	×0.01
IR	142	uint32 ABCD	R	rpm	×0.1
IR	144	uint32 ABCD	R	%	×0.01
IR	146	uint32 ABCD	R	%	×0.01
IR	148	uint32 ABCD	R	%	×0.01
IR	150	uint32 ABCD	R	%	×0.01
IR	152	uint32 ABCD	R	%	×0.01
IR	154	uint32 ABCD	R	%	×0.01
IR	156	uint32 ABCD	R	%	×0.01
IR	158	uint32 ABCD	R	%	×0.01
IR	160	uint32 ABCD	R	%	×0.01
IR	162	uint32 ABCD	R	%	×0.01
IR	164	int32 ABCD	R		×0.0001
IR	166	int32 ABCD	R		×0.0001
IR	168	int32 ABCD	R		×0.0001
IR	170	uint32 ABCD	R	A	×0.0001
IR	172	uint32 ABCD	R	A	×0.0001
IR	174	uint32 ABCD	R	A	×0.0001
IR	176	uint32 ABCD	R	A	×0.0001
IR	178	uint32 ABCD	R	rpm	×0.1
IR	4352	uint32 ABCD	R	h
IR	4354	uint32 ABCD	R	h
IR	4356	uint32 ABCD	R	min
IR	4358	uint32 ABCD	R	min
IR	7424	int32 ABCD	R			Unit set in the setup (UM1)
IR	7426	int32 ABCD	R			Unit set in the setup (UM2)
IR	7428	int32 ABCD	R			Unit set in the setup (UM3)
IR	7430	int32 ABCD	R			Unit set in the setup (UM4)
IR	7432	int32 ABCD	R			Unit set in the setup (UM5)
IR	7434	int32 ABCD	R			Unit set in the setup (UM6)
IR	7436	int32 ABCD	R			Unit set in the setup (UM7)
IR	7438	int32 ABCD	R			Unit set in the setup (UM8)
IR	3920	int32 ABCD	R			Unit set in the setup (UM1)
IR	3922	int32 ABCD	R			Unit set in the setup (UM2)
IR	3924	int32 ABCD	R			Unit set in the setup (UM3)

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Report a problemA wrong address, type, scale or byte order.
Read the formatWhat each key of the file means (SPEC.md).