Support Modbus/TCP in the Wi-Fi energy meter of IAMMETER

Register mapping Test the modbus tcp function by modbus poll How to get the latest firmware that support Modbus/TCP Highlight features of the 3 phase energy meter Video tutorial about the energy meter

Modbus TCP is common protocol that used in industrial system such as ICS, DCS, SCADA. After the latest firmware upgrading, the energy meter of IAMMETER had supported the modbus tcp protocol now.

This is a big upgrade of the Wi-Fi energy meter`s firmware .

Both WEM3080T(3 phase energy meter ,Wi-Fi) and WEM3080 (single phase energy meter, Wi-Fi) will support Modbus/TCP protocol. It will make the Wi-Fi energy meter easier to be integrated into the industrial system(Such as ICS, DSC, SCADA etc ..).

Video:Integrate a three-phase energy meter into Home assistant by Modbus TCP (over Wi-Fi)

Video:Request the data of 3 phase energy meter(Wi-Fi) from the Modbus TCP

Download the firmware and use the modbus/tcp function in IAMMETER energy meter

Register mapping

index	Register address(Dec)	Register address(Hex)	register length	Description
1	0	0x0	1	Phase A voltage,unsigned,value=data/100,unit: V
2	1	0x1	1	Phase A current,unsigned,value=data/100,unit: A
3	2	0x2	2	Phase A active power,signed,value=data,unit: W
4	4	0x4	2	Phase A forward energy in pulses ,unsigned, kWh=pulses/800, unit:kWh
5	6	0x6	2	Phase A reverse energy in pulses ,unsigned, kWh=pulses/800, unit:kWh
6	8	0x8	1	Phase A power factor,unsigned,value=data/1000
7	9	0x9	1	PadA 0x00,not used
8	10	0x0a	1	Phase B voltage,unsigned,value=data/100,unit: V
9	11	0x0b	1	Phase B current,unsigned,value=data/100,unit: A
10	12	0x0c	2	Phase B active power,signed,value=data,unit: W
11	14	0x0e	2	Phase B forward energy in pulses ,unsigned, kWh=pulses/800, unit:kWh
12	16	0x10	2	Phase B reverse energy in pulses ,unsigned, kWh=pulses/800, unit:kWh
13	18	0x12	1	Phase B power factor,unsigned,value=data/1000
14	19	0x13	1	PadB 0x00,not used
15	20	0x14	1	Phase C voltage,unsigned,value=data/100,unit: V
16	21	0x15	1	Phase C current,unsigned,value=data/100,unit: A
17	22	0x16	2	Phase C active power,signed,value=data,unit: W
18	24	0x18	2	Phase C forward energy in pulses ,unsigned, kWh=pulses/800, unit:kWh
19	26	0x1a	2	Phase C reverse energy in pulses ,unsigned, kWh=pulses/800, unit:kWh
20	28	0x1c	1	Phase C power factor,unsigned,value=data/1000
21	29	0x1d	1	PadC 0x00,not used
22	30	0x1e	1	frequency, unsigned,value=data/100,unit:Hz
23	31	0x1f	1	padH 0x00,not used
24	32	0x20	2	sum of power，signed，value=data，unit:W
25	34	0x22	2	sum of forward energy in pulses ,unsigned, kWh=pulses/800, unit:kWh
26	36	0x24	2	sum of reverse energy in pulses ,unsigned, kWh=pulses/800, unit:kWh
27	38	0x26	2	Phase A reactive power,signed,value=data,unit: var
28	40	0x28	2	Phase A inductive KVARH ,unsigned, kvarh=pulses/800, unit:kvarh
29	42	0x2a	2	Phase A capacitive KVARH ,unsigned, kvarh=pulses/800, unit:kvarh
30	44	0x2c	2	Phase B reactive power,signed,value=data,unit: var
31	46	0x2e	2	Phase B inductive KVARH ,unsigned, kvarh=pulses/800, unit:kvarh
32	48	0x30	2	Phase B capacitive KVARH ,unsigned, kvarh=pulses/800, unit:kvarh
33	50	0x32	2	Phase C reactive power,signed,value=data,unit: var
34	52	0x34	2	Phase C inductive KVARH ,unsigned, kvarh=pulses/800, unit:kvarh
35	54	0x36	2	Phase C capacitive KVARH ,unsigned, kvarh=pulses/800, unit:kvarh

Test the modbus tcp function by modbus poll

modbus tcp setting in modbus polling

Modbus TCP Register map in the wifi energy meter

How to get the latest firmware that support Modbus/TCP

Upgrading Precondition: Check your current firmware version, if it is >= 75.68, it means you can upgrade the firmware directly to support the Modbus TCP function.

We have planned to provide some free upgrades to our old customers who have such requirements, if you want to use the Modbus TCP function and your firmware version also meets the requirements, please contact us from our feedback system. About how to use our feedback system, please refer to https://www.iammeter.com/docs/feedback-and-notification

Please also help us to introduce how to use the Modbus TCP energy meter in your system.

We will pay more attention to the customers who give us a clear introduction about why they need to use Modbus TCP energy meter in their application.