Installation manual
Page 175 of 204
14.3 Necessary steps for draft, realization and testing
The realization of plant sections with safety related function requires special attention in
planning, realization and testing. Also for this the standards (see ISO 13849-2 or EN ISO
61508) contain specific guidelines. The effort thereby is orientated on the complexity of the
task for system components with safety related function.
For the realization of such functions the PSCBR-series offers safety relevant control and
monitoring functions to support the system architecture (architecture Cat. 4 acc. to EN ISO
13849-1) and, above all, also the programming language and tested safety functions.
Programming uses the form FUP (function plan oriented programming) recommended by the
safety standards. It fully meets the requirements on the programming language with limited
scope of languages (LVM) for the essential simplifications in documentation and testing.
The individual steps in any case require careful planning and analysis of the methods and
systems used. Furthermore, the individual steps must be documented in an understandable
way.
V-model (simplified)
The implementation of safety related functions requires a structured approach, like the V-
model that is exemplary described in applicable standards. The following shows an exemplary
approach for applications with modules of the PSCBR-series.
Spezifikation der
Sicherheitsmaßnahmen
Spezifikation des
funktionalen
Sicherheitssystems
Spezifikation der Hardware
für das funktionale
Sicherheitssystem
Spezifikation der Software /
Sicherheitsfunktionen für
das funktionale
Sicherheitssystem
Hard- und Softwaredesign
Prüfung der Umsetzung
Hardware durch Analyse
Anlagenaufbau /
Komponenten /Schaltung
Prüfung der Umsetzung
Software durch Analyse
FUP
Prüfung der korrekten
Programmierung und
Parametrierung durch
Analyse Validierungsreport
Prüfung des funktionalen
Sicherheitssystems durch
FIT (Fault Injection Test)
Gesamtvalidierung der
Sicherheitsmaßnahmen
Funktionales Sicherheitssystem
Spezifikation und Prüfung
Funktionales Sicherheitssystem
Spezifikation und Prüfung
der Software
Spezifikation und Prüfung
der Hardware incl. Nachweis Pl
Realisierung
Spezifikation und Validierung
aller Sicherheitsmaßnahmen
Specification of the safety
measures
Specification of the
functional safety system
Testing of the functional
safety system by means of
FIT (Fault Injection Test)
Overall validation of the
safety measures
Specification of the software
/ safety functions for the
functional safety system
Specification of the
hardware for the functional
safety system
Hard and software design
Inspection of the implementation
Hardware by analysis
System structure / components /
circuitry
Testing of correct
programming and
parameterization
Inspection of the
implementation
Software by analysis
FUP
Specification and validation of
all safety measures
Specification and testing of
the software
Specification and testing
Functional safety system
Specification and testing of
hardware incl. certification PI
Realization
Functional safety system
Summary of Contents for PSCBR-C-10 Series
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Page 181: ...Installation manual Page 181 of 204 Example for a risk analysis Gefahrenanalyse Risk analysis...