KRON Mult-K Série 2 Modbus register map

Three-phase multimeter: voltages, currents, frequency, power, power factor, energy, demand, minimums and maximums, settings and reset commands

Official
126 registers
Modbus RTU
Revision 1 · 2026-11-08
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.

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

Communication

Protocol: Modbus RTU
Unit ID: 1
Serial: 9600 8N1 · 9600 baud, 8 data bits, none parity, 1 stop bit
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: 10 holding registers, 104 input registers, 12 coils
Groups: 13
Translation tables: 6
Revision: 1 · 2026-11-08
Added: 2026-11-08 (2026-11-08)
File: maps/kron/mult-k-serie-2.mbmap.json · 20 KB · history
SHA-256: 31c79be8a53e9b2ac9c79e435ce2e375d215a57234b165a7f62222cae5cee4ae
Manufacturer: kron.com.br

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	input 1	uint32 ABCD

Sources and notes

Protocolo MODBUS – Mult-K Serie 2 · version 1.0, 2016-06
linked in issue #143

Source: KRON Protocolo MODBUS - Mult-K Série 2, rev. 1.0 (June 2016)

Modbus RTU on RS-485. Addresses are numbered from 1 as in the document (30.003 is input register 3, sent as 2). Commands are coils: command 006 is coil 6, sent as 5.
Float values are sent with the bytes fully reversed (the document's example sends 60 Hz as 00 00 70 42), which is little byte order and little word order. That is the factory setting of holding register 2901; changing it breaks this map.
Holding registers can be read or written at most 8 at a time; input registers up to 66 at a time.
The baud rate (9600 to 57600 bit/s) and the format (8N1, 8N2, 8E1, 8O1) are set on the display or in holding register 7. The document gives no factory default; 9600 8N1 is assumed here.
The THD registers (33.001 to 33.006) are left out: the document gives no scale or unit for them.
Written from the protocol document; this map has not been tested on a device.

Area	Address	Type	Access	Unit
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
IR	13	float32 DCBA	R	V
IR	15	float32 DCBA	R	V
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	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	1003	float32 DCBA	R	V
IR	2003	float32 DCBA	R	V
IR	1005	float32 DCBA	R	V
IR	2005	float32 DCBA	R	V
IR	1007	float32 DCBA	R	V
IR	2007	float32 DCBA	R	V
IR	1009	float32 DCBA	R	V
IR	2009	float32 DCBA	R	V
IR	1011	float32 DCBA	R	V
IR	2011	float32 DCBA	R	V
IR	1013	float32 DCBA	R	V
IR	2013	float32 DCBA	R	V
IR	1015	float32 DCBA	R	V
IR	2015	float32 DCBA	R	V
IR	1017	float32 DCBA	R	A
IR	2017	float32 DCBA	R	A
IR	1019	float32 DCBA	R	A
IR	2019	float32 DCBA	R	A
IR	1021	float32 DCBA	R	A
IR	2021	float32 DCBA	R	A
IR	1023	float32 DCBA	R	A
IR	2023	float32 DCBA	R	A
IR	1025	float32 DCBA	R	A
IR	2025	float32 DCBA	R	A
IR	1027	float32 DCBA	R	Hz
IR	2027	float32 DCBA	R	Hz
IR	1029	float32 DCBA	R	Hz
IR	2029	float32 DCBA	R	Hz
IR	1031	float32 DCBA	R	Hz
IR	2031	float32 DCBA	R	Hz
IR	1035	float32 DCBA	R	W
IR	2035	float32 DCBA	R	W
IR	1037	float32 DCBA	R	W
IR	2037	float32 DCBA	R	W
IR	1039	float32 DCBA	R	W
IR	2039	float32 DCBA	R	W
IR	1041	float32 DCBA	R	W
IR	2041	float32 DCBA	R	W
IR	1043	float32 DCBA	R	var
IR	2043	float32 DCBA	R	var
IR	1045	float32 DCBA	R	var
IR	2045	float32 DCBA	R	var
IR	1047	float32 DCBA	R	var
IR	2047	float32 DCBA	R	var
IR	1049	float32 DCBA	R	var
IR	2049	float32 DCBA	R	var
IR	1051	float32 DCBA	R	VA
IR	2051	float32 DCBA	R	VA
IR	1053	float32 DCBA	R	VA
IR	2053	float32 DCBA	R	VA
IR	1055	float32 DCBA	R	VA
IR	2055	float32 DCBA	R	VA
IR	1057	float32 DCBA	R	VA
IR	2057	float32 DCBA	R	VA
IR	1059	float32 DCBA	R
IR	2059	float32 DCBA	R
IR	1061	float32 DCBA	R
IR	2061	float32 DCBA	R
IR	1063	float32 DCBA	R
IR	2063	float32 DCBA	R
IR	1065	float32 DCBA	R
IR	2065	float32 DCBA	R
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

Help improve this map

I tested it on a deviceReport whether it worked, even if you did not write the map.
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).