Fagor DDS APS-24, Hardware Manual

Page: 321 / 406

   Functional safety
FUN
C
TI
ON
AL SAFET
Y
T
e
chnical data
of the
safety func
tions
9.
Ref.1912
· 321 ·
DDS
HARDWARE
9.7 Technical data of the safety functions
To calculate the machine's P erformance L evel (PL of EN ISO 13849-1)
and/or S afety I ntegrated L evel (SIL of IEC 62061), use the drive data
provided in the following tables:
High demand
The safety functions of the drive have been designed to be used in high
demand mode (at least once a year) according with regulation IEC 61800-5-
2.
T. H9/1 Calculation data according to EN ISO 13849-1.
T
M
( M ission T ime of the drive)
1 years 20
PL ( P erformance L evel) d
ST
O
MTTFd ( M ean T ime T o d angerous F ailure) years 247
DCavg (Average D iagnostic C overage) %
90
CCF (score of measures against C ommon
C ause F ailure)
80
B
10d
(average number of cycles until 10% of
the components suffers a dangerous failure)
cycles 10 000 000
Category 3
1
See Mission times in 9.11 Maintenance, repair and analysis of hazardous
events .
T. H9/2 Calculation data according to IEC 61508 and IEC 61800-5-2.
T
M
( M ission T ime of the drive)
1
years 20
STO
SFF ( S afe F ailure F raction) % 94
PFH ( P robability of F ailure per H our) 1/h 1,3 E-09

DU (


D angerous U ndetected failures) 1/h 4,6 E-08
HFT ( H ardware F ault T olerance) 1
SIL ( S afety I ntegrity L evel) 2
1
See Mission times in 9.11 Maintenance, repair and analysis of hazardous
events .
note 1

The SFF, PFH, MTTFd and DCavg data for STO are calculated
considering a - KM1 contactor with B10d = 1 300 000 life cycles and
demand of the STO safety function every 10 minutes, running 24 hours
a day.
note 2
See
Probabilities of dangerous failure. PFH and MTTFd
in
9.11
Maintenance, repair and analysis of hazardous events .
note 3
The external main contactor - KM1 installed must comply with standard
IEC 60947-4-1 (if it is a mirror-contact type) or with IEC 60947-5-1 (if its
contact is joined mechanically).