Ignition uses the OPC-UA Stale Threshold setting to determine when updates from a driver have taken too long to complete. This time period will be calculated as the fastest sampling rate for that node multiplied by the Stale Threshold setting value.

1. Go to the Configure section of the Gateway, and then go to OPC-UA > Settings.
   The Settings page is displayed.

2. Scroll down to the Other section and then to the Stale Threshold setting.
   This is a multiplier by which the server determines that updates from a driver have become stale.