YASKAWA iC9200 Series Operating Manual page 157

iC9200 Series
Safety relevant parameters
Parameters according to
DIN EN ISO 13849-1
Performance level
Category
PFH
D
DCavg
MTTF
D
Parameters according to
IEC 62061
SIL CL:
PFH
D
HFT
Lifetime
SFF
Parameters according to
IEC 61508
SIL
PFH
D
HFT
Lifetime
HB700 | CPU | PMC921xEx | en | 24-04
The values specified here refer exclusively to the safety CPUs specified in this manual.
Safety-relevant parameters can always be found in the corresponding manuals of the
modules.
NOTICE
After expiry of the device life time, the safety CPU must be decommissioned
and returned to the vendor!
Value Meaning
max. e Measure of the reliability of a safety function.
max 4 Measure of resistance to errors.
1 * 10-9/h Probability of Failure per Hour:
Probability of dangerous error per hour.
99% Diagnostic Coverage average:
Medium level of diagnostic coverage.
> 80 years Mean Time To dangerous Failure:
Average time to a dangerous failure.
Value Meaning
max 3 Safety Integrity Level Claim Limit
Safety requirement level for classifying the functional safety of the subsystem.
1 * 10-9/h Probability of Failure per Hour:
Residual error rate of dangerous error per hour.
1 Hardware Fault Tolerance
Number of faults that can result in a loss of the safety function.
300 month Device lifetime
No maintenance is required during the expected device lifetime.
99% Safe Failure Fraction:
Proportion of failures that result in the safety state.
Value Meaning
max 3 Safety Integrity Level
Safety requirement level for the classification of functional safety.
1 * 10-9/h Probability of Failure per Hour:
Residual error rate of dangerous error per hour.
1 Hardware Fault Tolerance
Number of faults that can result in a loss of the safety function.
300 month Device lifetime
No maintenance is required during the expected device lifetime.
Deployment CPU iC921xM-FSoE
Functional safety - safety relevant parameters
157