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4
Functional Safety data declaration
Product identification
IEC 61508 safety data
Safety integrity level
Random hardware failures (per hour)
– BiSS Safety protocol
Random hardware failures (per hour)
– Siemens DRIVE-CLiQ protocol
PFD
avg
PFH (per hour) – BiSS Safety protocol
PFH (per hour) – Siemens DRIVE-CLiQ protocol
Architectural constraints
Hardware safety integrity compliance
Systematic safety integrity compliance
Systematic capability
Demand mode
Proof test interval
4
FORTiS-S FS with BiSS Safety and
Siemens DRIVE-CLiQ protocols
2
l
=
8.60E-07
S
l
=
1.25E-06
D
l
=
1.13E-06
DD
l
=
1.25E-07
DU
l
=
1.11E-06
S
l
=
1.70E-06
D
l
=
1.53E-06
DD
l
=
1.70E-07
DU
Not applicable due to continuous
demand mode
l
=
1.25E-07
DU
l
=
1.70E-07
DU
Type
B
HFT
0
SFF
94%
Route 1H
Route 1S
SC 2
Continuous
Not required for continuous demand
mode
ISO 13849 safety data
MTTF
– BiSS Safety protocol
D
MTTF
– Siemens DRIVE-CLiQ protocol
D
Diagnostic coverage
Category
Performance level
Lifetime/replacement limits
The FORTiS-S FS encoder system provides safe position data that supports the following safety
sub‑functions defined by IEC 61800‑5‑2:
X
Safe stop 1 (SS1) and Safe stop 2 (SS2)
*
X
Safe operating stop (SOS)
X
Safe limited acceleration (SLA) ≤ 200 m/s
Safe acceleration range (SAR) ≤ 200 m/s
X
X
Safe limited speed (SLS) ≤ 4 m/s
X
Safe speed range (SSR) ≤ 4 m/s
*
X
Safely limited position (SLP)
*
X
Safely limited increment (SLI)
X
Safe direction (SDI)
X
Safe speed monitor (SSM) ≤ 4 m/s.
*
See the safety function restrictions for the safe position figure for each FORTiS‑S FS encoder system
variant.
91 years
67 years
Medium (90%)
3
d
20 years
*
2
2
Original instructions
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