Understand Virtual Flow Computer (VFC) data quality information
- Last UpdatedApr 24, 2025
- 2 minute read
The Virtual Flow Computer Summary window displays data quality indicators that give quick information about the points that are displayed.
The data quality indicators are symbols that appear next to the line they are associated with.
Note: By default, there are five data quality indicators. These data quality indicators are described in more detail in the AVEVA Enterprise SCADA HMI Controller documentation. Only two data quality indicators are used by the Virtual Flow Computer (VFC) Summary window.
The following table details the data quality information associated with the VFC.
|
Name |
Icon |
Priority Level |
Description |
|---|---|---|---|
|
Manual Override |
|
1 |
This indicator appears at the right side of a line of data to show that you have placed the point into manual override mode and has possibly entered a value to override the point’s normal data source. You can manually override telemetry or calculated points to prevent the overridden points from being updated via telemetry or calculation. Note: The manual override indicator is never displayed opposite "manual" points. These points are always in the manual mode and cannot be overridden. |
|
Stale |
|
2 |
This symbol is the stale data indicator. It appears at the right-hand side of a line of data to indicate that it is old or stale data. This represents the last valid condition of a correct poll. If the point in question is a telemetry point, the presence of this indicator means that either communication with the Remote Terminal Unit (RTU) has been lost, polling is improper, or the point has not been polled since system failover or start-up. The indicator appears after a preset number of failed poll attempts. If the point is a calculated point, the presence of this indicator means the point has not been calculated since system failover or start-up. |
