Examples Of Readouts Of Current Harmonics Data - ABB A43 User Manual

Communication with M-Bus
About the 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
data sent out
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 –
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

In the following are 2 examples of readouts of current harmonics data. The second
Comments
example, which is in telegram format, is commented. The comments are preceded
by semicolon. The data in both telegrams is hexadecimal.
The readout telegram for a phase contains the following data:
Example 1
Byte No.
1
2
3
4
5
6
7
8-11
12-13
14
15
16
17
18-19
20
21
22
23
A43/A44
User Manual
Data may temporarily be marked "not available" if there are disturbances on
Size Value Description
1 68 Start character
1 C0 L-field, calculated from C field to last user data
1 C0 L-field, repeated
1 68 Start character
1 08 C-field, RSP_UD
1 xx A-field, address
1 72 CI-field, data send, LSB first
4 xxxxxxxx Meter serial number, 8 BCD digits
2 4204 Manufacturer: ABB
1 xx Protocol version
1 02 Medium, 02=electricity
1 xx Access number
1 xx Status
1 0000 Signature (0000=no encryption)
1 02 DIF size, 2 byte integer
1 FF VIF next byte is manufacturer specific
1 ED VIFE current harmonics
1 FF VIFE next byte is manufacturer specific
256 2CMC48001M0201
Revision: C