The controller’s display has not updated for at least three seconds. Control continues in the background.
| At a glance | |
|---|---|
| Code | 540 |
| Shown as | Display Degraded |
| Severity | Warning |
| Category | 5xx — System / lifecycle |
| Clears | Automatically, when the display recovers |
The display has stalled. Control modes and network connections can keep running normally while it does.
Keeps controlling.