Firmware upgrading (98.70)

mDNS New parameter(CTCratio) Set the CTCratio to 2 Query the setting of the CTCratio Different result of Phase C in different CTCratio Add reactive power and kvarh in modbus/tcp Reference

new features of "i.75.98.70"

Support mDNS.
Provide a new parameter(CTCratio).
provide reactive power and kvarh in modbus/tcp.

mDNS

The mDNS protocol is supported since this version.

Before: if you do not know the IP of the device,the user can only use the SSDP discovery like "How to find the the meter already connected to your router" or log in to the router to find the IP that is allocated.

Now :the energy meter can be accessed by this URL(http://sn.local) , like the below pic.

Mdns function in the energy meter

New parameter(CTCratio)

You want to monitor a balanced output with two high legs and one neutral line, but there is only phase C left now (Phase A and phase B are already used to monitor the grid of 120/240V or 120/208V).

This parameter of "CTCratio" will help you solve this problem. If it is set to '2', the energy meter`s reading of current, active power reading, and Kwh will be doubled in phase C.

Because it is a balanced output. Measure one high leg and doubling its reading would be nearly the same result as measure two high legs and sum them together.

For more details ,please refer to Monitor the system of 120/240V or 120/208V in North America

WEM3080T in 120/240V or 120/208V system

No.	API	Description
1	/api/ctcratio	inquiry the reading of ctcratio
2	/api/ctcratio?x=2	set the CTCratio to 2
3	/api/ctcratio?x=1	set the CTCratio to 1

Set the CTCratio to 2

/api/ctcratio?x=2

Query the setting of the CTCratio

/api/ctcratio

Different result of Phase C in different CTCratio

Add reactive power and kvarh in modbus/tcp

The register map of the modubs/tcp is updated as below.

index	Register address(Dec)	Register address(Hex)	register len	Description
1	0	0000	1	Phase A voltage,unsigned,value=data/100,unit: V
2	1	0001	1	Phase A current,unsigned,value=data/100,unit: A
3	2	0002	2	Phase A active power,signed,value=data,unit: W
4	4	0004	2	Phase A forward energy,unsigned,value=data/800,unit:kWh
5	6	0006	2	Phase A reverse energy,unsigned,value=data/800,unit:kWh
6	8	0008	1	Phase A power factor,unsigned,value=data/1000
7	9	0009	1	model: 1:WEM3080 2:WEM3080T 3:WEM3046T 4:WEM3050T
8	10	000A	1	Phase B voltage,unsigned,value=data/100,unit: V
9	11	000B	1	Phase B current,unsigned,value=data/100,unit: A
10	12	000C	2	Phase B active power,signed,value=data,unit: W
11	14	000E	2	Phase B forward energy,unsigned,value=data/800,unit:kWh
12	16	0010	2	Phase B reverse energy,unsigned,value=data/800,unit:kWh
13	18	0012	1	Phase B power factor,unsigned,value=data/1000
14	19	0013	1	PadB 0x00,not used
15	20	0014	1	Phase C voltage,unsigned,value=data/100,unit: V
16	21	0015	1	Phase C current,unsigned,value=data/100,unit: A
17	22	0016	2	Phase C active power,signed,value=data,unit: W
18	24	0018	2	Phase C forward energy,unsigned,value=data/800,unit:kWh
19	26	001A	2	Phase C reverse energy,unsigned,value=data/800,unit:kWh
20	28	001C	1	Phase C power factor,unsigned,value=data/1000
21	29	001D	1	PadC 0x00,not used
22	30	001E	1	frequency, unsigned,value=data/100,unit:Hz
23	31	001F	1	padH 0x00,not used
24	32	0020	2	sum of power，signed，value=data，unit:W
25	34	0022	2	sum of forward energy,unsigned, value=data/800, unit:kWh
26	36	0024	2	sum of reverse energy,unsigned, value=data/800, unit:kwh
27	38	0026	2	Phase A reactive power, signed,value=data,unit: var
28	40	0028	2	Phase A Inductive reactive energy, unsigned,data/1000,unit: kvarh
29	42	002A	2	Phase A capacitive reactive energy, unsigned,data/1000,unit: kvarh
27	44	002C	2	Phase B reactive power, signed,value=data,unit: var
28	46	002E	2	Phase B Inductive reactive energy, unsigned,data/1000,unit: kvarh
29	48	0030	2	Phase B capacitive reactive energy, unsigned,data/1000,unit: kvarh
27	50	0032	2	Phase C reactive power, signed,value=data,unit: var
28	52	0034	2	Phase C Inductive reactive energy, unsigned,data/1000,unit: kvarh
29	54	0036	2	Phase C capacitive reactive energy, unsigned,data/1000,unit: kvarh
30	56	0038	8	serial number of the device