ABB A43

Communication with M-Bus
A43/A44 278 2CMC48001M0201
User Manual Revision: C
10.5.8 Set voltage transformer (VT) ratio - secondary voltage
The voltage transformer ratio (VT) secondary voltage is set by sending the fol-
lowing command (all values are hexadecimal). The command is affected by the
write protection level set.
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
04
DIF size, 32 bit integer
9
1
FF
VIF next byte is manufacturer specific
10
1
23
VIFE VT ratio secondary voltage
11-14
4
xx xx xx xx
New VT ratio secondary voltage
15
1
xx
CS checksum, calculated from C field to last data
16
1
16
Stop character
10.5.9 Select status information
To change the way the status information is sent out the following command is
sent (all values are hexadecimal). The command is not affected by the write
pro-tection level set.
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
01
DIF size, 8 bit integer
9
1
FF
VIF next byte is manufacturer specific
10
1
15
VIFE status of values (status byte on the values)
11
1
xx
0=never, 1=status if not OK=always
12
1
xx
CS checksum, calculated from C field to last data
13
1
16
Stop character