| IEC 60870-5-101 asdu object reference |
Measured value, short floating point value with CP56Time2a time tag.
| - obj | ASDU object | ||||||||||||
| |--- | + head | Reserved | |||||||||||
| |--- | - ident | DATA UNIT IDENTIFIER | |||||||||||
| | | |--- | eType | = 0x24 (36) | = M_ME_TF_1 | Type identification | ||||||||
| | | |--- | bSQ | = FALSE | Sequence of information objects | |||||||||
| | | |--- | nObj | = 1 | Number of objects | |||||||||
| | | |--- | bT | Test | ||||||||||
| | | |--- | bPN | Positive/negative confirmation/activation | ||||||||||
| | | |--- | eCOT | Cause of transmission | ||||||||||
| | | |--- | nORG | Originator address | ||||||||||
| | | |--- | asduAddr | Common address of asdu | ||||||||||
| | | |--- | eClass | Fifo priority class | ||||||||||
| |--- | - info | INFORMATION OBJECT | |||||||||||
| |--- | objAddr | Information object address | |||||||||||
| |--- | stream | Information element/object data | |||||||||||
| |--- | length | = 12 | |||||||||||
| |--- | data | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | ||||
| |--- | data[0..3] = | R32 | Short floating point value | ||||||||||
| |--- | data[4] = | IV | NT | SB | BL | 0 | 0 | 0 | OV | QDS = Quality descriptor | |||
| |--- | data[5..11] = | CP56Time2a | Seven octets binary time tag | ||||||||||
| |--- | data[12..IEC870_MAX_ASDU_DATA_BYTE] = | Reserved | |||||||||||