1766-RM001A-EN-P MicroLogix 1400 Programmable Controllers ...

310 Using InterruptsThe priorities from highest to lowest are:User Fault RoutineEvent Interrupt0Event Interrupt1High-Speed Counter Interrupt0Event Interrupt2Event Interrupt3High-Speed Counter Interrupt1Selectable Timed InterruptEvent Interrupt4High-Speed Counter Interrupt2Event Interrupt5High-Speed Counter Interrupt3Event Interrupt6High-Speed Counter Interrupt4Event Interrupt7High-Speed Counter Interrupt5highest prioritylowest priorityUser Fault RoutineThe user fault routine gives you the option of preventing a controllershutdown when a specific user fault occurs. The fault routine is executedwhen any recoverable or non-recoverable user fault occurs. The faultroutine is not executed for non-user faults.Faults are classified as recoverable, non-recoverable, and non-user faults.A complete list of faults is shown in Fault Messages and Error Codes onpage 577. The basic types of faults are described below:Publication 1766-RM001A-EN-P - October 2008