ABB A43

Communication with M-Bus
A43/A44 234 2CMC48001M0201
User Manual Revision: C
Read request for load profile with channel number specified
A read request for a load profile with channel no. specified as input is
performed by sending the following SND_UD to the meter followed by a
REQ_UD2 (all values are hexadecimal). Sending no date or date/time will
result in that the meter start by sending out the most recent data.
Byte No.
Size
Value
Description
1
1
68
Start character
2
1
0A
L-field, calculated from C field to last user data
3
1
0A
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
VIFE extension of manufacturer specific VIFE's, next VIFE
specifies actual meaning.
11
1
B8
VIFE specifying reading based upon the channel number
12
1
FF
VIFE next byte is manufacturer specific
13
1
F8
VIFE next byte is manufacturer specific, used for numbering
14
1
xx
VIFE specifies channel number (1-8)
15
1
xx
CS checksum, calculated from C field to last data
16
1
16
Stop character
Comments The data is sent out with a number of profile values in each telegram.
The first data item sent out in each telegram is the interval length.
After that the date/time for the end of the interval followed by the data value for
that interval is sent out
All load profile energy values and input counters are read as register values, that
is snapshots of the register at the end of the interval. All other load profile
values, for example voltages, currents, power factors, THD’s are read as interval
average values.
All load profile values have storage number 1 to indicate that it is stored
historical data.