Rs485 Communication; Readable And Writable Data - WEG MMW03-CH User Manual

4 RS485 COMMUNICATION

MMW03-CH model support RS485 communication. Please see Table 3-3 for the menu tree.

4.1 READABLE AND WRITABLE DATA

The following functions are supported:
„ Function 03H: This function reads the readable addresses in the modbus table.
„ Function 10H: This function writes to the writable addresses in the modbus table.
Definitions:
„ R / W: Can read and write the value in this address.
„ RO: Can only read the value in this address.
„ WO: Can only write to this address.
„ float: 32 bit floating number.
Related modbus table is given below:
Address Parameter
0 Phase 1 Voltage (L-N)
2 Phase 1-2 Voltage (L-L)
4 Phase 1 Current
6
Phase 1 Cosφ
8 Phase 1 Power Factor
10 Phase 1 Active Power
12 Phase 1 Reactive Power
14 Phase 1 Apparent Power
16 Phase 1 THDV
18 Phase 1 THDI
20 Phase 2 Voltage (L-N)
22 Phase 2-3 Voltage (L-L)
24 Phase 2 Current
26 Phase 2 Cosφ
28 Phase 2 Power Factor
30 Phase 2 Active Power
32 Phase 2 Reactive Power
34 Phase 2 Apparent Power
36 Phase 2 THDV
38 Phase 2 THDI
40 Phase 3 Voltage (L-N)
42 Phase 3-1 Voltage (L-L)
44 Phase 3 Current
46 Phase 3 Cosφ
48 Phase 3 Power Factor
50 Phase 3 Active Power
52 Phase 3 Reactive Power
54 Phase 3 Apparent Power
56 Phase 3 THDV
58 Phase 3 THDI
60 Average Voltage (L-N)
62 Average Voltage (L-L)
64 Total Current
66 System Power Factor
68 Total Active Power
70 Total Reactive Power
72 Total Apparent Power
74 System Frequency
Type
Phase-1 Basic Measurements
float
float
float
float
float
float
float
float
float
float
Phase-2 Basic Measurements
float
float
float
float
float
float
float
float
float
float
Phase-3 Basic Measurements
float
float
float
float
float
float
float
float
float
float
Common Measurements (Phase-1, Phase-2, Phase-3)
float
float
float
float
float
float
float
float
Read/Write Write Condition
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
Electronic Multimeter - MMW03-CH | 21
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