Risk Analysis/Assessment - Siemens Sinumerik 840D sl Function Manual
Sinumerik safety integrated
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1.2.9
Risk analysis/assessment
Systems and machines represent risks due to their design and functionality. For
this reason, the Machinery Directive requires that a risk assessment be performed
for each machine and, if necessary, the level of risk reduced until the residual risk
is less than the tolerable risk. To assess these risks, the following standard must
be applied:
S DIN EN ISO 12100 "Safety of Machinery -- General Design Principles -- Risk
Assessment and Minimizing Risks"
S DIN EN ISO 13849--1 "Safe control of machinery -- Safety--related parts of
control systems"
EN ISO 12100 mainly describes the risks to be considered and the design princi-
ples to minimize risks -- as well as the iterative process when assessing and redu-
cing risks to achieve the appropriate degree of safety.
Risk assessment is a procedure that allows hazards resulting from machines to be
systematically investigated. Where necessary, the risk assessment is followed by a
risk reduction procedure. When this procedure is repeated, an iterative process is
obtained (see Fig. 1-1), which can then be used to eliminate hazards as far as pos-
sible and so that the appropriate protective measures can be taken.
The risk assessment involves the
S Risk analysis
a) Determining the machine limits
b) Identifying hazards
c) Techniques to estimate risk
S Risk evaluation
As part of the iterative process to achieve the appropriate degree of safety, after
the risk has been analyzed the risk is assessed. Then, 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 applied. The risk assessment
must then be repeated.
© Siemens AG 2015 All Rights Reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
Regulations and standards
1.2 Safety of machinery in Europe
1-25
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