schmersal PSC1 - Verification of Software (Program) and Parameters; FUP Check

Installation manual
HB-37420-810-01-25F-EN PSC1-C-100 Installation manual - V2.2.docx Page 191 of 201
Version: 25F
Resulting PL for both channels:
Symmetrisation of
both channels:
MTTFd =
2
3
MTTFd_A +MTTFd_B −
1
1
MTTFd
_A
+
1
MTTFd
_B
=21,5 Jahre
DC average value
DCavg=
DCSwitch
MTTFd_Türz
+
DCSinCos
MTTFd_SinCos
+
DCPES
MTTFd_PES
+
DCSchütz
MTTFd_Schütz
+
DCSTO
MTTFd_STO
1
MTTFd_Türz
+
1
MTTFd_SinCos
+
1
MTTFd_PES
+
1
MTTFd_Netzsch
DCavg
=
0
,
9776
~
98%
PL MTTFd = 21.5 years = medium
DC
avg
= 98 % = medium
PL =“d“ (from EN ISO 13849-1, Tables 5, 6 and 7)
In this case the B10d value for the door monitoring is definitive for the PL. If
a higher safety level is to be achieved, a correspondingly higher quality
switch is to be used.
Note:
It is also possible to determine the PL using the tool "Sistema" from the BGIA, among others.
12.3.8 Verification of software (program) and parameters
The verification/validation is undertaken in two steps:
• Check on the FUP in relation to the specified functionality
• Check on the FUP against the IL listing in the validation report, and the parameters
specified against those in the validation report.
12.3.8.1 FUP check
The FUP actually programmed is to be checked against the requirements in the specification.
Note:
The comparison is all the more efficient the clearer the programming has been structured in
relation to the safety functions.