Janitza UMG 96RM-E Modbus register map

Also covers UMG96RM-E

96 mm panel power analyser with Ethernet (Modbus TCP) and RS-485 (Modbus RTU)

Official
83 registers
Modbus TCP and RTU
Revision 2 · 2026-10-17
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 TCP and RTU
Unit ID: 1
TCP port: 502
Serial: 115200 8N1 · 115200 baud, 8 data bits, none parity, 1 stop bit
Byte / word order: ABCD · bytes big-endian, words high first
Addresses: 0-based

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

Map

Registers: 83 holding registers
Groups: 3
Revision: 2 · 2026-10-17
Firmware: from firmware 3.01, hardware release 104
Added: 2026-10-14 (2026-10-14)
File: maps/janitza/umg-96rm-e.mbmap.json · 14 KB · history
SHA-256: 1c10e6b83236ea6b0e1c2e92796cc595fad9c09b0c610f732fe260d05e18c63a
Manufacturer: janitza.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 754	uint32 ABCD

Sources and notes

UMG 96RM-E Modbus address list · 2024-06
frequently required readings (19000-19120) and parameter table

Source: Janitza electronics, "UMG 96RM-E Modbus address list" (2024-06)

Addresses are the protocol addresses of the address list; all values are holding registers (FC03 read, FC06/FC16 write).
Values are big-endian; the device also serves them little-endian at the same address + 32768.
Not in this map: the rest of the address list (200 ms values, mean, minimum and maximum values, Fourier analysis, configuration); this map covers the frequently required readings block.
Parameter registers 0-50 can also be set with the device buttons.

Area	Address	Type	Access	Unit	Description
HR	19000	float32 ABCD	R	V
HR	19002	float32 ABCD	R	V
HR	19004	float32 ABCD	R	V
HR	19006	float32 ABCD	R	V
HR	19008	float32 ABCD	R	V
HR	19010	float32 ABCD	R	V
HR	19012	float32 ABCD	R	A
HR	19014	float32 ABCD	R	A
HR	19016	float32 ABCD	R	A
HR	19018	float32 ABCD	R	A
HR	19020	float32 ABCD	R	W
HR	19022	float32 ABCD	R	W
HR	19024	float32 ABCD	R	W
HR	19026	float32 ABCD	R	W
HR	19028	float32 ABCD	R	VA
HR	19030	float32 ABCD	R	VA
HR	19032	float32 ABCD	R	VA
HR	19034	float32 ABCD	R	VA
HR	19036	float32 ABCD	R	var
HR	19038	float32 ABCD	R	var
HR	19040	float32 ABCD	R	var
HR	19042	float32 ABCD	R	var
HR	19044	float32 ABCD	R
HR	19046	float32 ABCD	R
HR	19048	float32 ABCD	R
HR	19050	float32 ABCD	R	Hz
HR	19052	float32 ABCD	R
HR	19054	float32 ABCD	R	Wh
HR	19056	float32 ABCD	R	Wh
HR	19058	float32 ABCD	R	Wh
HR	19060	float32 ABCD	R	Wh
HR	19062	float32 ABCD	R	Wh
HR	19064	float32 ABCD	R	Wh
HR	19066	float32 ABCD	R	Wh
HR	19068	float32 ABCD	R	Wh
HR	19070	float32 ABCD	R	Wh
HR	19072	float32 ABCD	R	Wh
HR	19074	float32 ABCD	R	Wh
HR	19076	float32 ABCD	R	Wh
HR	19078	float32 ABCD	R	VAh
HR	19080	float32 ABCD	R	VAh
HR	19082	float32 ABCD	R	VAh
HR	19084	float32 ABCD	R	VAh
HR	19086	float32 ABCD	R	varh
HR	19088	float32 ABCD	R	varh
HR	19090	float32 ABCD	R	varh
HR	19092	float32 ABCD	R	varh
HR	19094	float32 ABCD	R	varh
HR	19096	float32 ABCD	R	varh
HR	19098	float32 ABCD	R	varh
HR	19100	float32 ABCD	R	varh
HR	19102	float32 ABCD	R	varh
HR	19104	float32 ABCD	R	varh
HR	19106	float32 ABCD	R	varh
HR	19108	float32 ABCD	R	varh
HR	19110	float32 ABCD	R	%
HR	19112	float32 ABCD	R	%
HR	19114	float32 ABCD	R	%
HR	19116	float32 ABCD	R	%
HR	19118	float32 ABCD	R	%
HR	19120	float32 ABCD	R	%
HR	0	int16	RW		Default 1; 0 and 248-255 are reserved
HR	1	int16	RW		Default 4
HR	2	int16	RW
HR	3	int16	RW		Default 0
HR	10	float32 ABCD	RW	A
HR	12	float32 ABCD	RW	A
HR	14	float32 ABCD	RW	V
HR	16	float32 ABCD	RW	V
HR	18	float32 ABCD	RW	A
HR	20	float32 ABCD	RW	A
HR	22	float32 ABCD	RW	V
HR	24	float32 ABCD	RW	V
HR	26	float32 ABCD	RW	A
HR	28	float32 ABCD	RW	A
HR	30	float32 ABCD	RW	V
HR	32	float32 ABCD	RW	V
HR	34	int16	RW	Hz	0 = automatic, 45-65 = fixed frequency
HR	50	int16	RW		0-999, 0 = no password
HR	750	int16	R
HR	754	uint32 ABCD	R
HR	756	uint32 ABCD	R
HR	761	uint16	R

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).