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Geo SCADA Knowledge Base
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Originally published on Geo SCADA Knowledge Base by sbeadle1 | June 10, 2021 12:56 AM
Blocked | BL | This means that the value of the point is as it was prior to being blocked. Blocking prevents updating of the value of the point | OPC_QUALITY_LAST_USABLE |
Substituted | SB | This is where a value has been substituted or forced by manual entry or otherwise. It means that the value is not derived from the normal measurement | OPC_QUALITY_LOCAL_OVERRIDE |
Not Topical | NT | This is means that the value was not updated successfully at the last time it was due to be updated | OPC_QUALITY_LAST_USABLE |
Invalid | IV | This indicates that the value cannot be used because it may be incorrect due to a fault or other abnormal condition | OPC_QUALITY_BAD |
Overflow Bit | OV | This means that a value is out of a defined range. It is used primarily with analog or counter values | OPC_QUALITY_EGU_EXCEEDED |
Elapsed Time Invalid | EI | This is used with events of protection equipment. If set it means that the elapsed time interval value is invalid. This means that for some reason the elapsed time value cannot be relied upon and should be ignored | Not currently used in ClearSCADA |
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