ABB A43 User Manual

Communication with M-Bus
2CMC48001M0201 255 A43/A44
Revision: C User Manual
10.4.5 Readout of Current Harmonics
Read request
A read request for current 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
1B
VIFE specifies current 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
2
1
08
L-field, calculated from C field to last user data
3
1
08
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
01
DIF size, 8 bit integer
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
1B
VIFE specifies current harmonics
12
1
xx
Phase number 1-3, 4 for the neutral
13
1
xx
CS checksum, calculated from C field to last data
14
1
16
Stop character

ABB A43 Specifications

General

Brand	ABB
Model	A43
Category	Measuring Instruments
Language	English