ABB A43 User Manual

Communication with M-Bus
2CMC48001M0201 275 A43/A44
Revision: C User Manual
Byte No.
Size
Value
Description
10
1
13
VIFE tariff
11
1
xx
New tariff
12
1
xx
CS checksum, calculated from C field to last data
13
1
16
Stop character
10.5.2 Set primary address
The primary address is set by sending the following command (all values are
hexadecimal). The command is not affected by the write protection level set.
Byte No.
Size
Value
Description
1
1
68
Start character
2
1
06
L-field, calculated from C field to last user data
3
1
06
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
7A
VIFE Bus Address
10
1
xx
New primary address
11
1
xx
CS checksum, calculated from C field to last data
12
1
16
Stop character
10.5.3 Change baud rate
The baud rate of the electrical M-Bus interface is set by sending the following
command (all values are hexadecimal). The command is not affected by the
write protection level set.
After the baud rate has been changed a command must be sent to the meter (any
command, for example NKE or REQ_UD2) that is received correctly by the
me-ter before a certain time out time (normally 30 seconds) for the meter to
keep the new baud rate. Otherwise the meter falls back to use the baud rate that
was used before the baud rate change. This functionality is used to prevent
changing to a baud rate that doesn’t work for some reason.
Byte No.
Size
Value
Description
1
1
68
Start character
2
1
03
L-field, calculated from C field to last user data
3
1
03
L-field, repeated
4
1
68
Start character
5
1
53/73
C-field, SND_UD
6
1
xx
A-field, address
7
1
Bx
CI-field, New baud rate (where x=>8..F)
8
1
xx
CS checksum, calculated from C field to last data

ABB A43 Specifications

General

Brand	ABB
Model	A43
Category	Measuring Instruments
Language	English