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Communication with M-Bus
A43/A44
256
2CMC48001M0201
User Manual
Revision: C
About the
data sent out
The meter will send out harmonic data for one phase in each telegram, which
means 4 telegrams in a 3-element meter (for the 3 phase currents and the
neutral), 2 telegrams in a 2-element meter (for the phase 1 and 3 currents) and 1
telegram in a single phase meter.
Data sent out will be the total harmonic distortion and the harmonics with num-
bers 2-16. Note that the total harmonic distortion is calculated from the
harmonics measured and is thus not the true total harmonic distortion, which
would require all harmonics (up to infinite frequency) to be measured.
Note
–
Data may temporarily be marked "not available" if there are disturbances on
the net (for example due to short voltage dips) making the frequency measurement
invalid. Also directly after startup all harmonics will be marked "not available" as
they haven't been measured yet. As the harmonics are measured sequentially one
at a time they will be available one by one.
10.4.5.1 Examples of Readouts of Current Harmonics Data
Comments
In the following are 2 examples of readouts of current harmonics data. The second
example, which is in telegram format, is commented. The comments are preceded
by semicolon. The data in both telegrams is hexadecimal.
Example 1
The readout telegram for a phase contains the following data:
Byte No.
Size
Value
Description
1
1
68
Start character
2
1
C0
L-field, calculated from C field to last user data
3
1
C0
L-field, repeated
4
1
68
Start character
5
1
08
C-field, RSP_UD
6
1
xx
A-field, address
7
1
72
CI-field, data send, LSB first
8-11
4
xxxxxxxx
Meter serial number, 8 BCD digits
12-13
2
4204
Manufacturer: ABB
14
1
xx
Protocol version
15
1
02
Medium, 02=electricity
16
1
xx
Access number
17
1
xx
Status
18-19
1
0000
Signature (0000=no encryption)
20
1
02
DIF size, 2 byte integer
21
1
FF
VIF next byte is manufacturer specific
22
1
ED
VIFE current harmonics
23
1
FF
VIFE next byte is manufacturer specific
Summary of Contents for A43
Page 1: ...A43 A44 User Manual ...
Page 40: ...Meter Settings A43 A44 40 2CMC48001M0201 User Manual Revision C ...
Page 55: ...Technical Description 2CMC48001M0201 55 A43 A44 Revision C User Manual ...
Page 58: ...Technical Description A43 A44 58 2CMC48001M0201 User Manual Revision C ...
Page 61: ...Technical Description 2CMC48001M0201 61 A43 A44 Revision C User Manual ...
Page 75: ...Technical Description 2CMC48001M0201 75 A43 A44 Revision C User Manual ...
Page 84: ...Measurement Methods A43 A44 84 2CMC48001M0201 User Manual Revision C ...
Page 91: ...Measurement Methods 2CMC48001M0201 91 A43 A44 Revision C User Manual ...
Page 95: ...Measurement Methods 2CMC48001M0201 95 A43 A44 Revision C User Manual ...
Page 102: ...Communication with Modbus A43 A44 102 2CMC48001M0201 User Manual Revision C ...
Page 107: ...Communication with Modbus 2CMC48001M0201 107 A43 A44 Revision C User Manual ...
Page 131: ...Communication with Modbus 2CMC48001M0201 131 A43 A44 Revision C User Manual ...
Page 147: ...Communication with Modbus 2CMC48001M0201 147 A43 A44 Revision C User Manual ...
Page 154: ...Communication with Modbus A43 A44 154 2CMC48001M0201 User Manual Revision C ...
Page 157: ...Communication with Modbus 2CMC48001M0201 157 A43 A44 Revision C User Manual ...
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Page 166: ...Communication with Modbus A43 A44 166 2CMC48001M0201 User Manual Revision C ...
Page 180: ...Communication with M Bus A43 A44 180 2CMC48001M0201 User Manual Revision C ...
Page 182: ...Communication with M Bus A43 A44 182 2CMC48001M0201 User Manual Revision C ...
Page 188: ...Communication with M Bus A43 A44 188 2CMC48001M0201 User Manual Revision C ...
Page 195: ...Communication with M Bus 2CMC48001M0201 195 A43 A44 Revision C User Manual ...
Page 254: ...Communication with M Bus A43 A44 254 2CMC48001M0201 User Manual Revision C ...
Page 257: ...Communication with M Bus 2CMC48001M0201 257 A43 A44 Revision C User Manual ...