A fault is an error state in your controller that prevents it from executing normally. It must be resolved in order for the controller to resume its normal execution. There are a few ways of confirming that a controller fault is the cause of a process upset:
- An operator may notice that a controller fault is indicated on a Human Machine Interface (HMI) display.
- The fault light is lit up on your controller, or a fault code is listed on the scrolling status display on the controller.
- You can see a fault indicated when you go online with your controller from RSLogix5000/Logix Designer.
The following screenshot demonstrates a major fault from the Controller Properties window:
Troubleshooting faults in Logix is the process of locating and resolving problems encountered during the execution of a project on a controller. Access to Piping and Instrumentation Diagram...