Safety Functions - Wöhner MOTUS IO-Link Instrucciones De Servicio

Acyclic output process data (16 bit)
Two rated currents can be parameterised using acyclic services.
The "nominal current 1" must always be confirmed using the device Set/Reset button. If
this is not done, the device will not accept the parameterised value.
The "nominal current 2" value must be less than the "nominal current 1" value. Only the
"nominal current 1" will be stored in the device.
When restarting the device, "nominal current 2" is set to the same value as "nominal
current 1".
Index Type
24 String
Bit 0 ... 3
66 Byte
0
Bit 4 ... 7
Bit 0 ... 3
67 Byte
0
Bit 4 ... 7

10. Safety functions

System conditions
database for failure rates
system type (consisting of subsystems)
standard used
Beta factor
MTTF [years] (mean time to failure at an ambient
temperature of 40 °C)
Safe switch-off
HFT hardware fault tolerance
Ambient temperature
MTTF [years] mean time to failure
D
Switch-off time [ms]
λ
[FIT] safe, undetectable
su
λ
[FIT] dangerous, detectable
dd
λ
[FIT] dangerous, undetectable
du
SFF [%] safe failure fraction
DC [%] diagnostic coverage
PFH [FIT] probability of a dangerous failure per hour
D
PFD (6 months/36 months) average probability of
avg
failure on demand
safety level as per
Additional safety-related data available upon request.
Revision 1, dated 01/2021
Description
ApplicationSpecific
Tag
nominal current 1 0000: lowest value for overload trip
...
setting
1111: highest value for overload trip
not used not used
Nominal current 2 0000: lowest value for overload trip
...
setting
1111: highest value for overload trip
not used not used
Value
SN 29500
Type B
IEC 61508
1 %
34
1
40 °C
164
200
1311
694
0.1
99
99
0.1
-6 -6
0.5 * 10 / 2.9 * 10
IEC/CEI 61508-1: to SIL 3
ISO 13849-1: to category 3 PL e
English.
20