The Delta Aggregate defined in Table 38 retrieves the difference between the earliest and latest Good raw values in the interval. The Aggregate is negative if the latest value is less than the earliest value. The status is Uncertain_DataSubNormal if non-Good values are skipped while looking for the first or last values. The status is Good otherwise. The status is Bad_NoData if no Good raw values exist.
Table 38 – Delta Aggregate summary
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Delta Aggregate Characteristics |
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Type |
Calculated |
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Data Type |
Same as Source |
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Use Bounds |
None |
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Timestamp |
StartTime |
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StatusCode Calculations |
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Calculation Method |
Custom Uncertain_DataSubNormal if non-Good values are skipped while looking for the first or last values |
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Partial |
Set Sometimes If an interval is not a complete interval |
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|
Calculated |
Set Always
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|
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Interpolated |
Not Set |
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|
Raw |
Not Set |
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|
Multi Value |
Not Set |
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|
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StatusCode Common Special Cases |
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Before Start of Data |
Bad_NoData |
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After End of Data |
Bad_NoData |
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No Start Bound |
Does not apply |
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No End Bound |
Does not apply |
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Bound Bad |
Does not apply |
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|
Bound Uncertain |
Does not apply |
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