M-bus data point mapping
Primarily, the mapping happens through data information block (DIB) and value information block (VIB) codes which are part of the I/O address. In addition, the building automation (BA) properties such as unit, data type, BitOffset, NumBits, etc. are also used.
Definitions, Acronyms and Abbreviations, Conventions
The entire data point mapping is a play on this data record header that consists majorly of DIB and VIB.
DIF | DIFE | VIF | VIFE | Data |
1 Byte | 0-10 (1 Byte each) | 1 Byte | 0-10 (1 Byte each) | 0-n Byte |
Data information block DIB | Value information Block VIB |
| ||
Data record header DRH |
| |||
DIF: Data information field
DIFE: Data information field extension
VIF: Value information field
VIFE: Value information field extensions