|76543210|76543210|76543210|76543210|
+--------+--------+--------+--------+
| type | instance number |
+--------+--------+--------+--------+
| Length | Contents |
|---|
| 10 bits | object type |
| 22 bits | object instance number |
Example of a full tagtttt clll tttt tttt ttii iiii iiii iiii iiii iiii
0000 1100 0000 0010 0000 0000 0000 0000 1000 0111
| contents | field | value | length (bits) |
| tag number | tttt | 0000 | 4 bits |
| class | c | 1 | 1 bit |
| length | lll | 100 | 3 bits |
| type of object | tttt tttt tt | 0000 0010 00 | 10 bits |
| instance number | ii iiii iiii iiii iiii iiii | 00 0000 0000 0000 1000 0111 | 22 bits |
| type number | type name |
|---|
| 0 | Analog Input |
| 1 | Analog Output |
| 2 | Analog Value |
| 3 | Binary Input |
| 4 | Binary Output |
| 5 | Binary Value |
| 6 | Calendar |
| 7 | Command |
| 8 | Device |
| 9 | Event Enrollment |
| 10 | File |
| 11 | Group |
| 12 | Loop |
| 13 | Multi-state Input |
| 14 | Multi-state Output |
| 15 | Notification Class |
| 16 | Program |
| 17 | Schedule |