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© Siemens AG 2008 All Rights Reserved
SIMODRIVE 611 Configuration Manual (PJU) – 05/2008 Edition
!
Warning
If the ”safe standstill” function or a stop function, Category 0 in accordance with
EN 60204–1, is activated, the motor can no longer provide any torque. As a
result of this, potentially hazardous motion can occur, e.g. for:
S When the drive axes are subject to an external force.
S Vertical and inclined axes without weight equalization.
S Axes that are moving (coasting down).
S Direct drives with low friction and self–clocking behavior.
Possible hazards must be clearly identified using a risk analysis that must be
carried out by the manufacturer. Using the assessment based on this risk
analysis, it must be defined as to which additional measures are required (e.g.
external brakes).
!
Warning
If the ”safe standstill” function is activated, when a fault condition occurs, the
mechanical axis system can make a jerky movement (possibility of injury,
crushing) as a result of the principle of operation. The magnitude of this
movement depends on the following parameters:
S Design/configuration and mechanical ratios between the motor/mechanical
system.
S Speed and acceleration capability of the motor
S Magnitude of the selected monitoring clock cycle.
S Size of the selected standstill tolerance window.
The danger and warning information above must always be unconditionally ob-
served in order to avoid personal injury and property damage.
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