Siemens SINUMERIK 840D sl Function Manual page 27

05.08
The risk assessment is a sequence of steps that allows hazards, as a result of ma-
chines, to be systematically investigated. Where necessary, a risk reduction proce-
dure follows risk assessment. When this procedure is repeated, an iterative pro-
cess is obtained (see Fig. 1-1), which can then be used to eliminate hazards as far
as possible and so that the appropriate protective measures can be taken.
The risk assessment involves the following
S Risk analysis
a) Determines the limits of the particular machine (EN ISO 12100–1, EN ISO
14121–1 Para. 5)
b) Identifies the hazards (EN ISO 12100–1, EN ISO 14121–1 Para. 6)
c) Techniques to estimate risk (EN 1050 Para. 7)
S Risk evaluation (EN ISO 14121–1 Para. 8)
As part of the iterative process to achieve the appropriate degree of safety, after
the risk has been estimated, the risk is evaluated. In so doing, a decision must be
made as to whether the residual risk must be reduced. If the risk is to be further
reduced, suitable protective measures must be selected and also applied. The risk
assessment should then be repeated.
START
Determining the machine limits
Identifying the potential hazard
Risk estimation
Risk evaluation
Is the machine safe?
Risk reduction
Minimizing risks and selecting suitable protective measures are not part of the risk assessment
Fig. 1-1 Iterative process to achieve safety in compliance with ISO 14121–1
© Siemens AG 2008 All Rights Reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 05.2008 Edition
Yes
No
Regulations and Standards
1.2 Safety of machinery in Europe
Risk assessment
Risk analysis
End
1-27