ABB A43

Communication with M-Bus
2CMC48001M0201 265 A43/A44
Revision: C User Manual
10.4.6 Readout of Voltage Harmonics
Read request
A read request for voltage harmonics is performed by sending the following
SND_UD to the meter followed by a REQ_UD2 (all values are hexadecimal).
Byte No.
Size
Value
Description
1
1
68
Start character
2
1
07
L-field, calculated from C field to last user data
3
1
07
L-field, repeated
4
1
68
Start character
5
1
53/73
C-field, SND_UD
6
1
xx
A-field, address
7
1
51
CI-field, data send, LSB first
8
1
00
DIF size, no data
9
1
FF
VIF next byte is manufacturer specific
10
1
F9
VIF extension of manufacturer specific VIFE's, next VIFE
specifies actual meaning
11
1
2D
VIFE specifies voltage harmonics
12
1
xx
CS checksum, calculated from C field to last data
13
2
16
Stop character
Read request for a specific phase
A read request for a specific phase is performed by sending the following
SND_UD to the meter followed by a REQ_UD2 (all values are hexadecimal).
Byte No.
Size
Value
Description
1
1
68
Start character