806-807 / 973
a CSA International company
The analysis should include all components, E/E/M/EM
necessary to implement the safety functions.
Identify the possible dangerous modes of failures of all
components which prevent a safe response during a demand
Dangerous failures are detected by automatic on-line
diagnostic tests which improve the DC fraction.
Types of diagnostics tests may include, Continuous signal
monitoring, External stimuli, Built in checksums, comparison
of measured values by redundancy approach, implemented
by another element within the SRS.
Diagnostic can operate continuous or periodical upon PTI.
Definition of Annex A