2 Configuration
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01/22 MN040062EN
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15
2 Configuration
DANGER – CONTROL FAILURE
When engineering your control diagram, make sure to take all
potential control path faults into account.
When it comes to critical control functions, make sure that a
safe state can be reached after a control path fails.
Critical control function examples include:
•
Emergency shutdown (emergency stop),
•
Overtravel stop
•
Power supply failure
•
Restart.
Provide separate or redundant control paths.
Make sure that system control paths include communication
connections.
Take the effect of unforeseen transmission delays and connec-
tion problems into account.
Carefully and individually test every implementation of a product
before putting it into operation.
Observe all general accident prevention and local safety regulati-
ons.
Information for the USA:
For more information, please refer to the latest issue of
NEMA ICS 1.1, “Safety Guidelines for the Application, Installa-
tion, and Maintenance of Solid State Control,” and the latest
issue of NEMA ICS 7.1, “Safety Standards for Construction and
Guide for Selection, Installation, and Operation of Adjustable-
Speed Drive Systems.”
In addition to property damage, failure to observe the
above instructions may result in serious bodily injury or
even death.
