Siemens Sinumerik 840D sl Function Manual page 130

Sinumerik safety integrated

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Table of Contents

Safety functions integrated in the system/drive

6.3 Safe Stops A- -F

If the safe standstill function or "STOP A" is activated, the motor can no longer

generate any torque. This is the reason that potentially hazardous motion can

occur, e.g. for the following:

S When an external force acts on the drive axes

S Vertical and inclined axes without weight equalization

S Axes that are moving (coasting down)

S Direct drives with low friction and low self--locking

S Notching torques (depending on the motor type, bearing design and friction

characteristics, up to half a pole pitch in a direction that cannot be predicted)

Possible hazards must be clearly identified using a risk analysis that must be

carried out by the manufacturer. With an assessment, based on this risk analysis,

it should be defined as to which additional measures are required, e.g. external

SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition

Sinamics s120