Fail-Silent (EN)

Fail-Silent System Behavior

Fail-Silent is a system behavior that remains inactive and silent when a failure occurs. This behavior is an essential part of fail-safe concepts, as it prevents a faulty system from generating hazardous states or affecting other components. Fail-Silent behavior significantly contributes to functional safety.

Architecture

stateDiagram-v2     [*] --> Normalbetrieb     Normalbetrieb --> Fehlerzustand: Fehler detektiert     Fehlerzustand --> Stillstand: Fail-Silent aktiv     Stillstand --> Wartung: Eingriff durch Personal     Wartung --> Normalbetrieb: Repariert     Fehlerzustand --> Gefährlicher Zustand: Fail-Silent inaktiv 

In Context

• Typically used together with fail-safe concepts
• Related to: Failsafe, Redundancy, Fault Tolerance
• Example use case: Safety systems in industrial facilities where system failure without further action is safer than continued operation with errors