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© Siemens AG 2008 All Rights Reserved
SIMODRIVE 611 Configuration Manual (PJU) – 05/2008 Edition
When carrying out a risk assessment of the machine in accordance with the EU
Machinery Directive, the machine manufacturer must consider the following
residual risks associated with the control and drive components of a power drive
system (PDS).
1. Unintentional movements of driven machine components during commis-
sioning, operation, maintenance, and repairs caused by, for example:
– Hardware defects and/or software errors in the sensors, controllers,
actuators, and connection technology
– Response times of the controller and drive
– Operation outside the specification
– Errors when parameterizing, programming and wiring
– Use of radio devices/cellular phones in the immediate vicinity of the
controller
– External effects
2. Exceptional temperatures as well as emissions of light, noise, particles, or
gas caused by, for example:
– Component malfunctions
– Software errors
– Operation outside the specification
– External effects
3. Hazardous shock voltages caused by, for example:
– Component malfunctions
– Static charges
– Operation outside the specification
– Condensation/conductive contamination
– External effects
4. Electrical, magnetic, and electromagnetic fields that can pose a risk to
people with a pacemaker and/or implants if they are too close.
5. Emission of pollutants if components or packaging are not disposed of
properly.
An assessment of the residual risks (see points 1 to 5 above) established that
these risks do not exceed the specified limit values (risk priority number in
accordance with EN 60812 RPZ = 100).
For additional information, refer to the relevant sections of the Configuration
Manual.
At the present time, other known residual risks are:
S Acceleration of the spindle or axes due to:
– Encoder errors, e.g. errors in the absolute measuring system (CD track),
loose contacts in encoder cables or unsuitable encoders.
– Cyclically interchanged phases of the motor connections
(V–W–U instead of U–V–W).
– Interchanged control sense.
– Electric faults (defective components, etc.).
– Operation of a demagnetized synchronous motor with saturation–based
pole position identification.
– Transfer of an incorrect, but plausible actual value in absolute measuring
systems (encoder does not signal an error).
Residual risks
Forword02.07
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