Steps Required For Designing, Realisation And Testing - schmersal PSC1 Series Installation Manual

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12.3 Steps required for designing, realisation and testing

The realisation of parts of systems with a safety-related function requires particular care during
planning, realisation and testing. Guidelines on these issues are also given in the applicable
standards (cf. EN ISO 13849-2 or EN ISO 61508). The effort here depends on the complexity
of the task for parts of the system with a safety-related function.
For the realisation of such functions with the aid of safety-related control and monitoring
functions, the PSC1 series offers efficient support in the form of the system architecture
(architecture cat. 4 according to EN ISO 13849-1) and above all also the programming
language and tested safety functions. Programming is in the form of FUP (function plan
orientated programming) recommended in the safety standards. It also corresponds to the
requirements on a limited variability programming language (LVL) for which significant
simplifications in the documentation and test scope apply.
In any case the individual steps require careful planning and analysis of the methods and
systems used. The individual steps are also to be documented so they are clearly traceable.
V model (simplified)
The implementation of safety-related functions requires a structured procedure as is shown,
for example, in the V model recommended in applicable standards. In the following as an
example the procedure for applications with modules from the PSC1 series is shown.
Spezifikation der
Sicherheitsmaßnahmen
Spezifikation des
funktionalen
Sicherheitssystems
Spezifikation der Software /
Sicherheitsfunktionen für
das funktionale
Sicherheitssystem
Spezifikation der Hardware
für das funktionale
Sicherheitssystem
HB-37350-810-01-38F-DE PSC1-C-10 Installation manual V1.1.docx
Version: 38F
Prüfung des funktionalen
Sicherheitssystems durch
FIT (Fault Injection Test)
Prüfung der korrekten
Programmierung und
Parametrierung durch
Analyse Validierungsreport
Prüfung der Umsetzung
Software durch Analyse
FUP
Prüfung der Umsetzung
Hardware durch Analyse
Anlagenaufbau /
Komponenten /Schaltung
Hard- und Softwaredesign
Spezifikation und Validierung
Gesamtvalidierung der
aller Sicherheitsmaßnahmen
Sicherheitsmaßnahmen
Funktionales Sicherheitssystem
Spezifikation und Prüfung
Funktionales Sicherheitssystem
Spezifikation und Prüfung
der Software
Spezifikation und Prüfung
der Hardware incl. Nachweis Pl
Realisierung
Page 150 of 177

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