ABB A43 User Manual page 231

Communication with M-Bus
Read request for a specified date and channel number
A read request for a specified date and channel number is performed by sending
the following SND_UD to the meter followed by a REQ_UD2 (all values are hexa‐
decimal).
Byte No. Size
1 1
2 1
3 1
4 1
5 1
6 1
7 1
8 1
9 1
10 1
11 1
12 1
13 1
14 1
15-16 2
17 1
18 1
Read request for a specified date, time and quantity
A read request for a specified date, time and quantity is performed by sending
the following SND_UD to the meter followed by a REQ_UD2 (all values are
hexa-decimal).
Byte No. Size
1 1
2 1
3 1
4 1
5 1
6 1
7 1
8 1
9 1
10 1
2CMC48001M0201
Revision: C
Value Description
68 Start character
0D L-field, calculated from C field to last user data
0D L-field, repeated
68 Start character
53/73 C-field, SND_UD
xx A-field, address
51 CI-field, data send, LSB first
02 DIF size, 2 byte integer
EC VIF time point, date, M-Bus data type G
FF VIFE next byte is manufacturer specific
F9 VIFE extension of manufacturer specific VIFE's, next VIFE
specifies actual meaning.
B8 VIFE specifying readout based on channel number
FF VIFE next byte is manufacturer specific
xx VIFE specifying data channel number
xxxx Date (M-Bus data type G, LSB byte sent first)
xx CS checksum, calculated from C field to last data
16 Stop character
Value Description
68 Start character
0E L-field, calculated from C field to last user data
0E L-field, repeated
68 Start character
53/73 C-field, SND_UD
xx A-field, address
51 CI-field, data send, LSB first
0E DIF size, 12 digit BCD data
ED VIF time point, date, M-Bus data type G
FF VIFE next byte is manufacturer specific
231 A43/A44
User Manual