KRON Konect Modbus register map

Three-phase energy meter with RS-485, Ethernet, Wi-Fi and Bluetooth: voltages, currents, frequency, power, power factor, energy, demand, THD, minimums and maximums, mass memory settings and commands

Official
262 registers
Modbus TCP and RTU
Revision 1 · 2026-11-10

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 TCP and RTU
Unit ID: 255
TCP port: 502
Serial: 9600 8N2 · 9600 baud, 8 data bits, none parity, 2 stop bits
Byte / word order: DCBA · bytes little-endian, words low first (word swap)
Addresses: 1-based · wire address = address − 1
Max read: 8 registers per request

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

Map

Registers: 47 holding registers, 190 input registers, 20 coils, 5 discrete inputs
Groups: 20
Translation tables: 3
Revision: 1 · 2026-11-10
Added: 2026-11-10 (2026-11-10)
File: maps/kron/konect.mbmap.json · 49 KB · history
SHA-256: de1295fc81420c70a2b4f0455bfcdf2f79116f644ed93a6685768933da839e53
Manufacturer: kron.com.br

Sources and notes

Protocolo MODBUS – Konect · version 2.1, 2022-05
linked in issue #142

Source: KRON, "Protocolo MODBUS – Konect", rev. 2.1 (May 2022)

Modbus RTU on RS-485 and Modbus TCP (port 502, up to 2 sockets). Addresses are numbered from 1 as in the document (30.015 is input register 15, sent as 14). Commands are coils: command 006 is coil 6, sent as 5.
Float values use the KRON sequence F2, F1, F0, EXP, which is the bytes fully reversed (the document's example sends 60 Hz as 00 00 70 42): little byte order and little word order. That is the default of holding register 42901; changing it breaks the float registers. Integers described as MSB first override this with big byte order.
The document gives 254 as the factory Modbus RTU address and 255 as the Modbus TCP slave id; 255 is used here. After a factory restore (coil 090) the serial format is 8N2 at 9600 bit/s, which is what the connection defaults show. Baud rates 9600, 19200, 38400 and 57600; formats 8N1, 8N2, 8E1 and 8O1. At most 8 holding registers per request.
Registers marked firmware 6.7 or later exist only from that version; the document does not say how older units answer. Holding register 40007 and most network settings take effect only after the device restarts (coil 006).
The THD values have no scale or unit in the document and are given raw. The harmonic grouping tables (34.001 to 34.480), the real-time clock registers 42.001 to 42.004 (packed BCD), the MAC addresses (6 raw bytes at 39.501 to 39.509), the IP, mask, gateway and DNS addresses, the MQTT broker, user, token and topic strings, the Wi-Fi and Bluetooth passwords, the LoRa keys and settings, the solar module registers (special version) and the mass memory read-out are not mapped.
Written from the protocol document; this map has not been tested on a device.

Area	Address	Type	Access	Unit	Scale	Description
IR	1	uint32 ABCD	R
IR	3	float32 DCBA	R	V
IR	5	float32 DCBA	R	V
IR	7	float32 DCBA	R	V
IR	9	float32 DCBA	R	V
IR	11	float32 DCBA	R	V		In delta systems this holds the line-to-line voltage
IR	13	float32 DCBA	R	V		In delta systems this holds the line-to-line voltage
IR	15	float32 DCBA	R	V		In delta systems this holds the line-to-line voltage
IR	17	float32 DCBA	R	A
IR	19	float32 DCBA	R	A
IR	21	float32 DCBA	R	A
IR	23	float32 DCBA	R	A
IR	25	float32 DCBA	R	A
IR	27	float32 DCBA	R	Hz
IR	29	float32 DCBA	R	Hz
IR	31	float32 DCBA	R	Hz
IR	33	float32 DCBA	R	Hz
IR	35	float32 DCBA	R	W
IR	37	float32 DCBA	R	W
IR	39	float32 DCBA	R	W
IR	41	float32 DCBA	R	W
IR	43	float32 DCBA	R	var
IR	45	float32 DCBA	R	var
IR	47	float32 DCBA	R	var
IR	49	float32 DCBA	R	var
IR	51	float32 DCBA	R	VA
IR	53	float32 DCBA	R	VA
IR	55	float32 DCBA	R	VA
IR	57	float32 DCBA	R	VA
IR	59	float32 DCBA	R
IR	61	float32 DCBA	R
IR	63	float32 DCBA	R
IR	65	float32 DCBA	R
IR	67	float32 DCBA	R
IR	69	float32 DCBA	R
IR	71	float32 DCBA	R
IR	73	float32 DCBA	R
IR	75	float32 DCBA	R			Voltage unbalance factor (factor D in the document); no unit given
IR	77	float32 DCBA	R
IR	79	float32 DCBA	R
IR	81	float32 DCBA	R
IR	95	float32 DCBA	R			Pulse count, 0 to 9999999 then back to 0
IR	97	float32 DCBA	R			Pulse count, 0 to 9999999 then back to 0
IR	99	float32 DCBA	R			Pulse count, 0 to 9999999 then back to 0
IR	111	uint16 BA	R			Firmware 6.7 or later
IR	112	uint16 BA	R			Firmware 6.7 or later
IR	113	uint16 BA	R			Firmware 6.7 or later
IR	114	uint16 BA	R			Firmware 6.7 or later
IR	115	uint16 BA	R			Firmware 6.7 or later
IR	131	uint16 BA	R	s	×0.1	Interval between two rising edges, in units of 100 ms (0 to 999, 999 meaning 99.9 s or more); firmware 6.7 or later
IR	132	uint16 BA	R	s	×0.1	Interval between two rising edges, in units of 100 ms (0 to 999, 999 meaning 99.9 s or more); firmware 6.7 or later
IR	133	uint16 BA	R	s	×0.1	Interval between two rising edges, in units of 100 ms (0 to 999, 999 meaning 99.9 s or more); firmware 6.7 or later
IR	151	uint16 BA	R			0 off, 1 on; tied to the hour meter trigger, firmware 6.7 or later
IR	161	float32 DCBA	R	h		Hours with the hundredths as a fraction of an hour (45.50 is 45 h 30 min); firmware 6.7 or later
IR	201	float32 DCBA	R	kWh
IR	203	float32 DCBA	R	kvarh
IR	205	float32 DCBA	R	kWh
IR	207	float32 DCBA	R	kvarh
IR	209	float32 DCBA	R	kW
IR	211	float32 DCBA	R	kW
IR	213	float32 DCBA	R	kVA
IR	215	float32 DCBA	R	kVA
IR	1005	float32 DCBA	R	V
IR	1007	float32 DCBA	R	V
IR	1009	float32 DCBA	R	V
IR	1011	float32 DCBA	R	V
IR	1013	float32 DCBA	R	V
IR	1015	float32 DCBA	R	V
IR	1017	float32 DCBA	R	A
IR	1019	float32 DCBA	R	A
IR	1021	float32 DCBA	R	A
IR	1023	float32 DCBA	R	A
IR	1025	float32 DCBA	R	A
IR	1027	float32 DCBA	R	Hz
IR	1029	float32 DCBA	R	Hz
IR	1031	float32 DCBA	R	Hz
IR	1033	float32 DCBA	R	Hz
IR	1035	float32 DCBA	R	W
IR	1037	float32 DCBA	R	W
IR	1039	float32 DCBA	R	W
IR	1041	float32 DCBA	R	W
IR	1043	float32 DCBA	R	var
IR	1045	float32 DCBA	R	var
IR	1047	float32 DCBA	R	var
IR	1049	float32 DCBA	R	var
IR	1051	float32 DCBA	R	VA
IR	1053	float32 DCBA	R	VA
IR	1055	float32 DCBA	R	VA
IR	1057	float32 DCBA	R	VA
IR	1059	float32 DCBA	R
IR	1061	float32 DCBA	R
IR	1063	float32 DCBA	R
IR	1065	float32 DCBA	R
IR	1067	float32 DCBA	R
IR	1069	float32 DCBA	R
IR	1071	float32 DCBA	R
IR	1073	float32 DCBA	R
IR	1075	float32 DCBA	R
IR	1077	float32 DCBA	R
IR	1079	float32 DCBA	R

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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).