Register Addresses
Each parameter is held in two consecutive 16 bit registers. The following table details the 3X
register address, and the values of the address bytes within the message. A tick (÷) in the
column indicates that the parameter is valid for the particular wiring system. Any parameter
with a cross (X) will return the value Zero (0000h).
Each parameter is held in the 3X registers. Modbus Code 04 is used to access all parameters.
e.g. to request
Volts 1
Start address
= 00
No of words
= 02
Volts 2
Start address
= 02
No of words
= 02
Each request for data must be restricted to 40 parameters or less. Exceeding the 40 parameter
limit will cause a Modbus exception code to be returned.
27
Address
Parameter Parameter
4-wire
3-wire
(Register)
Number
Modbus Start
Address Hex
High Byte Low Byte
30001
1
Volts 1 (L1 – N 4W or L1 – L2 3W)
00
00
√
√
30003
2
Volts 2 (L2 – N 4W or L2 – L3 3W)
00
02
√
√
30005
3
Volts 3 (L3 – N 4W or L3 – L1 3W)
00
04
√
√
30007
4
Current 1
00
06
√
√
30009
5
Current 2
00
08
√
√
30011
6
Current 3
00
0A
√
√
30043
22
Volts Ave
00
2A
√
√
30047
24
Current Ave
00
2E
√
√
30053
27
Watts Sum
00
34
√
√
30057
29
VA Sum
00
38
√
√
30061
31
VAr Sum
00
3C
√
√
30063
32
Power Factor Ave
00
3E
√
√
30071
36
Frequency
00
46
√
√
30073
37
Wh Import
00
48
√
√
30077
39
Varh Import
00
4C
√
√
30085
43
W Demand Import
00
54
√
√
30087
44
W Max. Demand Import
00
56
√
√
30105
53
A Demand
00
68
√
√
30107
54
A Max. Demand
00
6A
√
√
30201
101
V L1-L2 (calculated)
00
C8
√
X
30203
102
V L2-L3 (calculated)
00
CA
√
X
30205
103
V L3-L1 (calculated)
00
CC
√
X
30225
113
Neutral Current
00
E0
√
X
30235
118
THD Volts 1
00
EA
√
√
