The OPC Client driver displays the quality of the data in the selected item as part of its statistics. Data quality can be good, bad, or uncertain. Each quality type can also have the following additional text (substring) to further explain the quality:
|
Data Quality |
Additional Text (Substrings) |
|
Good |
Local Override |
|
Bad |
Config Error Input not Connected Device Failure Sensor Failure Data Latched Communication Failure Out of Service |
|
Uncertain |
Last Usable Value Sensor not Accurate EGU units exceeded Sub-normal |
The OPC Foundation defines each quality type and substring. For more information on the definition of each item, visit the OPC Foundation website.
