B&R 5MP040.0381-01, Руководство пользователя

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Standards and certifications
Mobile Panel 40/50 User's manual V1.80 99
Performance level (PL) Probability of dangerous failure per hour
a ≥10
-5
to <10
-4
b ≥3 x 10
-6
to <10
-5
c ≥10
-6
to <3 x 10
-6
d ≥10
-7
to <10
-6
e ≥10
-8
to <10
-7
Table 52: EN ISO 13849-1:2015, table 3 - Performance levels (PL)
5.5.4 Abbreviations
Abbreviations Term Explanation
B
10d
- Number of cycles before 10% of the components have experienced hazardous failure (per chan-
nel)
MTTF
d
Mean time to dangerous failure Average time before hazardous failure occurs (per channel)
DC Diagnostic coverage Degree of error detection
PL Performance level Discrete level that specifies the ability of safety -related parts of a controller to perform a safety
function under foreseeable conditions
PFH Probability of failure per hour Probability of a failure per hour
SIL Safety integrity level Safety integrity level
Table 53: Abbreviations