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For the Structure object type: it is possible to specify the index where IEC 61850 Quality is located. The format of the Quality Index is the same as a complex address.
IEC 61850 Quality is of Bitstring type with a length of 2 bytes. 13 quality bits are defined as follows (the standard numbers the bits so that the highest bit is 0 and the lowest is 15):
| Bit(s) | Note | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0-1 | Validity:
| |||||||||||||||
2 | Overflow | |||||||||||||||
3 | OutofRange | |||||||||||||||
4 | BadReference | |||||||||||||||
| 5 | Oscillatory | |||||||||||||||
| 6 | Failure | |||||||||||||||
| 7 | OldData | |||||||||||||||
| 8 | Inconsistent | |||||||||||||||
| 9 | Inaccurate | |||||||||||||||
| 10 | Source ( 0-Process, 1-Substituted) | |||||||||||||||
| 11 | Test | |||||||||||||||
| 12 | OperatorBlocked | |||||||||||||||
| 13-15 | unused bits |
If at least one of bits number 2-12 is set, the value in D2000 has a Weak attribute.
See the example in Time Index.
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