schmersal PSC1-C-10 Series, Installation Manual

Page: 150 / 173

Installation manual
PSC1-C-10 Installation manual V2.6 Page 150 of 173
Version: 57E
12.3.1 Phases of the V model
Designation Description
Design phase Validation phase
Specification and
validation of all
passive and active
safety measures Specification of all safety
measures to be taken such as
covers, barriers, max. machine
parameters, safety-related
functions etc.
Check on all passive and active
safety measures for their correct
implementation and effectiveness
Specification of the
functional safety
system Specification of the active safety
systems and their allocation to
the risks to be reduced, e.g.
limited speed in setting up mode,
stop mode, monitoring of the
access areas etc.
Specification of the PLr or
required SIL for each individual
safety function Check on all active safety systems for
their effectiveness and compliance
with the parameters specified, e.g.
incorrectly increased speed,
incorrect stop, triggering of
monitoring devices etc. using
practical tests
Specification of the
software / safety
functions Specification of the functionality
of individual safety functions incl.
definition of the shutdown circuit
etc.
Definition of the parameters for
the individual safety function, e.g.
max. speed, stop ramps and
category etc. Check on the correct
implementation of the functional
specifications by means of analysis
of FUP programming
Validation of the application
program and the parameters by
comparison of the validation report
with FUP and specifications for
parameters
Specification of the
hardware Specification of the system layout
and the functions for the
individual sensors, controls,
control components and
actuators in relation to the safety
functions Check on the correct
implementation of the
specifications.
Determination of the probability of
failure or PL by means of analysis of
the complete architecture and the
characteristic data for all
components involved, in each case in
relation to the individual safety
functions
Hardware and
software design Specific planning and
implementation of the system
layout / wiring.
Specific implementation of the
safety functions by means of
programming in FUP