![ABB A43 User Manual Download Page 197](http://html.mh-extra.com/html/abb/a43/a43_user-manual_4297197.webp)
Communication with M-Bus
2CMC48001M0201
197
A43/A44
Revision: C
User Manual
10.3 Standard Readout of Meter Data
General
This section describes the readout of the default telegrams containing energy and
instrumentation values etc. The data readout procedure starts when the master
sends a REQ_UD2 telegram to the meter. The meter responds with a RSP_UD
telegram. A typical readout is a multi-telegram readout. The last DIF in the user
data part of the telegram is 1F to indicate that there is more data in the next tele-
gram, or 0F if there are no more telegrams.
For EQ meters there are up to 7 default telegrams to read. In meters with internal
clock more telegrams may follow, containing previous values data. The most re-
cent values are sent out first having storage number 1, then the second most re-
cently stored values with storage number 2 and so on until all stored previous
values have been read. If no previous values exist in a meter with internal clock a
telegram is sent out where all data is marked with status byte for "No data avail-
able".
It is also possible to read previous values starting from a specific date and back-
wards in time by sending a special read request.
Note
–
Note: Normally the meter is configured to send out power values as 32 bit
integers, expressed in W (or var/VA) with 2 decimals. This means that the maximum
power possible to express is approximately ± 21 MW
Below following sections is an example of a readout of the 7 default telegrams
and 2 previous values telegrams, containing the most recent snapshot of previous
values. Note that these are examples only, data types and scaling of the quantities
can differ between meters, as well as the allocation of quantities to different tele-
grams.
10.3.1 Example of the 1st telegram (all values are hexadecimal)
Byte No.
Size
Value
Description
1
1
68
Start character
2
1
FA
L-field, calculated from C field to last user data
3
1
FA
L-field, repeated
4
1
68
Start character
5
1
08
C-field, RSP_UD
6
1
xx
A-field, address
7
1
72
CI-field, variable data respond, LSB first
8-11
4
xxxxxxxx
Identification Number, 8 BCD digits
12-13
2
4204
Manufacturer: ABB
14
1
02
Version
15
1
02
Medium, 02 = Electricity
16
1
xx
Number of accesses
17
1
xx
Status
18-19
2
0000
Signature (0000 = no encryption)
Summary of Contents for A43
Page 1: ...A43 A44 User Manual ...
Page 40: ...Meter Settings A43 A44 40 2CMC48001M0201 User Manual Revision C ...
Page 55: ...Technical Description 2CMC48001M0201 55 A43 A44 Revision C User Manual ...
Page 58: ...Technical Description A43 A44 58 2CMC48001M0201 User Manual Revision C ...
Page 61: ...Technical Description 2CMC48001M0201 61 A43 A44 Revision C User Manual ...
Page 75: ...Technical Description 2CMC48001M0201 75 A43 A44 Revision C User Manual ...
Page 84: ...Measurement Methods A43 A44 84 2CMC48001M0201 User Manual Revision C ...
Page 91: ...Measurement Methods 2CMC48001M0201 91 A43 A44 Revision C User Manual ...
Page 95: ...Measurement Methods 2CMC48001M0201 95 A43 A44 Revision C User Manual ...
Page 102: ...Communication with Modbus A43 A44 102 2CMC48001M0201 User Manual Revision C ...
Page 107: ...Communication with Modbus 2CMC48001M0201 107 A43 A44 Revision C User Manual ...
Page 131: ...Communication with Modbus 2CMC48001M0201 131 A43 A44 Revision C User Manual ...
Page 147: ...Communication with Modbus 2CMC48001M0201 147 A43 A44 Revision C User Manual ...
Page 154: ...Communication with Modbus A43 A44 154 2CMC48001M0201 User Manual Revision C ...
Page 157: ...Communication with Modbus 2CMC48001M0201 157 A43 A44 Revision C User Manual ...
Page 161: ...Communication with Modbus 2CMC48001M0201 161 A43 A44 Revision C User Manual ...
Page 166: ...Communication with Modbus A43 A44 166 2CMC48001M0201 User Manual Revision C ...
Page 180: ...Communication with M Bus A43 A44 180 2CMC48001M0201 User Manual Revision C ...
Page 182: ...Communication with M Bus A43 A44 182 2CMC48001M0201 User Manual Revision C ...
Page 188: ...Communication with M Bus A43 A44 188 2CMC48001M0201 User Manual Revision C ...
Page 195: ...Communication with M Bus 2CMC48001M0201 195 A43 A44 Revision C User Manual ...
Page 254: ...Communication with M Bus A43 A44 254 2CMC48001M0201 User Manual Revision C ...
Page 257: ...Communication with M Bus 2CMC48001M0201 257 A43 A44 Revision C User Manual ...