ABB A43 User Manual page 185

Communication with M-Bus
The User Data contains the data to be sent to the recipient.
User data
The following table shows the structure of the data sent from the meter to
the master:
Fixed data header
12 bytes
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.
4 bytes 2 bytes
The following list explains the content of the fixed data header:
2CMC48001M0201
Revision: C
Data records
Variable number of bytes
Manufacturer Version
1 byte
• 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
185
MDH
1 byte
Medium Access No. Status
1 byte 1 byte 1 byte
Signature
2 byte
A43/A44
User Manual