ABB A43

Communication with M-Bus
2CMC48001M0201 185 A43/A44
Revision: C User Manual
User data The User Data contains the data to be sent to the recipient.
The following table shows the structure of the data sent from the meter to
the master:
Fixed data header
Data records
MDH
12 bytes
Variable number of bytes
1 byte
The following table shows the structure of the data sent from the master to the
meter:
Data records
Variable number of bytes
Fixed data header The following table shows the structure of the fixed data header:
ID No.
Manufacturer
Version
Medium
Access No.
Status
Signature
4 bytes
2 bytes
1 byte
1 byte
1 byte
1 byte
2 byte
The following list explains the content of the fixed data header:
• Identification No. is the 8-digit serial number of the meter (BCD coded).
• Manufacturer is set to 0442h meaning ABB
• Version specifies the version of the protocol implementation. The meters
currently use the protocol version equal to 0x20.
• Medium byte is set to 02h to indicate electricity.
• Access number is a counter that counts successful accesses.
• Status byte is used to indicate the meter status.
Bit Meaning
0 Meter busy
1 Internal error
2 Power low
3 Permanent error
4 Temporary error
5 Installation error
6 Not used
7 Not used
• Signature is set to 00 00h