Hazard And Risk Analysis; Standards - Lenze 8400 StateLine C Hardware Manual

During operation
After the installation is completed, the operator must check the wiring of the safety
function.
The functional test must be repeated at regular intervals. The time intervals to be selected
depend on the application, the entire system and the corresponding risk analysis. The
inspection interval should not exceed one year.
Residual hazards
In case of a short−circuit of two power transistors a residual movement of the motor of up
to 180 °/number of pole pairs may occur! (Example: 4−pole motor Þ residual movement
max. 180 °/2 = 90 °)
This residual movement must be considered in the risk analysis, e.g. safe torque off for
main spindle drives.
10.2.1

Hazard and risk analysis

This documentation can only accentuate the need for a hazard analysis. The user of
drive−based safety must concentrate on dealing with the standards and legal position:
Before putting a machine into circulation, the manufacturer of the machine must carry out
a hazard analysis according to the Machinery Directive 98/37/EC to find out the hazards
related to the application of the machine. To achieve a level of safety as high as possible
the Machinery Directive contains three principles:
Removing or minimising the hazards by the construction itself.
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Taking the protective measures required against hazards that cannot be removed.
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Documentation of the existing residual risks and training of the user regarding
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these risks.
The execution of the hazard analysis is specified in EN 1050, guidelines for risk assessment.
The result of the hazard analysis determines the category of safety−based control modes
according to EN ISO 13849−1 which the safety−oriented parts of the machine control must
comply with.
10.2.2

Standards

Safety regulations are confirmed by laws and other governmental guidelines and
measures and the prevailing opinion among experts, e.g. by technical regulations.
The regulations and rules to be applied must be observed in accordance with the
application.
EDS84ASC552 EN 6.0
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Safety engineering
Important notes
Hazard and risk analysis
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