glossary-term: Mode of Operation

  • August 2, 2025
    Continuous mode, in functional safety, describes safety functions that must operate at all times—continuously maintaining safe conditions and controlling hazards.…
  • August 2, 2025
    Mode of operation, in functional safety, specifies how often a safety function is required to act—categorized as low demand, high…
  • August 2, 2025
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  • May 5, 2025
    Low Demand Mode means a SIF is expected to operate fewer than once per year. It impacts which metrics apply…
  • May 5, 2025
    Demand Rate is how often a Safety Instrumented Function (SIF) is expected to operate—usually expressed in demands per year.
  • May 5, 2025
    Demand Mode means a SIF only acts when called—during abnormal conditions. This is distinct from continuous or high demand operation.