M_ST_NA_1
Step position information without time tag.
- obj |
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| ASDU object | ||||||||
|--- | + head |
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| Reserved | ||||||||
|--- | - ident |
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| DATA UNIT IDENTIFIER | ||||||||
| | |--- | eType | = 0x05 (5) | = M_ST_NA_1 | Type identification | ||||||||
| | |--- | bSQ |
| = FALSE | Sequence of information objects | ||||||||
| | |--- | nObj |
| = 1 | Number of objects | ||||||||
| | |--- | bT |
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| Test | ||||||||
| | |--- | bPN |
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| Positive/negative confirmation/activation | ||||||||
| | |--- | eCOT |
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| Cause of transmission | ||||||||
| | |--- | nORG |
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| Originator address | ||||||||
| | |--- | asduAddr |
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| Common address of asdu | ||||||||
| | |--- | eClass |
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| Fifo priority class | ||||||||
|--- | - info |
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| INFORMATION OBJECT | ||||||||
| |--- | objAddr |
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| Information object address | ||||||||
| |--- | stream |
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| Information element/object data | ||||||||
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| |--- | length | = 2 |
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| |--- | data |
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
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| |--- | data[0] = | VTI | Value with transient state indication | |||||||
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| |--- | data[1] = | 0 | 0 | 0 | QDS = Quality descriptor | |||||
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| |--- | data[2..IEC870_MAX_ASDU_DATA_BYTE] = |
| Reserved | |||||||