Issue
A control object in Sigma is showing WUH (Wind Up Inhibit) as the Reason for State (RFS), but this attribute is not visible or editable in the Object Editor.
Product Line
Satchwell BAS & Sigma
Environment
Satchwell BAS & Sigma
Cause
In legacy BAS systems, Wind Up Inhibit (WUH) was used to prevent integral control action from continuing when the plant was off.
During upgrades from BAS to Sigma, this attribute may persist in the control object but is no longer supported or visible in Sigma’s Object Editor. As a result, Sigma or EBO may still display WUH as the RFS, even though it cannot be modified or removed through standard editing.
Resolution
To resolve the issue:
- Record the control object’s parameters (e.g., setpoints, PID values, alarm settings).
- Delete the affected control object from Sigma.
- Recreate the control object manually in Sigma.
- Restore the previously recorded parameters to the new object.
This process removes the legacy WUH reference and ensures the control object behaves as expected in Sigma.
