Siemens SINUMERIK 840D sl Function Manual

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As a result of the fault analysis, the machine manufacturer is in a position to define the residualrisk at his machine regarding Safety Integrated. The following residual risks are known.WARNINGAdditional residual risks● Safety Integrated is only activated if all of the system components are powered-up andhave been booted.● Faults in the absolute track (C-D track), cyclically interchanged phases of motorconnections (V-W-U instead of U-V-W) and a reversal in the control direction can causean increase in the spindle speed or axis motion. Category 1 and 2 Stop functions accordingto EN 60204-1 (defined as Stop B to E in Safety Integrated) that are provided, are howevernot effective due to the fault.Category 0 stop function according to EN 60204-1 (defined as STOP A in SafetyIntegrated) is not activated until the transition or delay time set via machine data hasexpired. When SBR is active, these errors are detected (STOP B/C) and the Category 0stop function according to EN 60204-1 (STOP A in Safety Integrated) is activated as earlyas possible irrespective of this delay (see Chapter "Safe Acceleration Monitor(Page 134)"). Electrical faults (defective components etc.) can also result in the responsedescribed above.● When incremental encoders are used, the functions "Safe software limit switches" (SE)and "Safe software cams or cam tracks" (SN) can only be used after referencing has beensuccessfully completed.● When no user agreement has been given (see Chapter "User agreement (Page 92)", "Useragreement"), the safe software limit switches (SE) are not active; the safe software camsor cam tracks (SN) are active, but are not safe in the sense of Safety Integrated.● The simultaneous failure of two power transistors (one in the upper and the other offsetin the lower inverter bridge) in the inverter may cause the axis to move briefly.The maximum movement can be:Synchronous rotary motors: Max. movement = 360° / no. of pole pairsSynchronous linear motors: Max. movement = pole widthExample: Synchronous motor:For a 6-pole synchronous motor, the axis can move by a maximum of 60 degrees. Witha ballscrew that is directly driven by, e.g. 20 mm per revolution, this corresponds to amaximum linear motion of approximately 3.33 mm.Example, synchronous linear motor:For a synchronous linear motor, the movement can be a maximum of one pole width. Thiscorresponds to the following distances:1FN1-07: 27 mm1FN1-12/-18/-24: 36 mm1FN3: 20 mmSystem features4.5 Safety information & instructions and residual risksSafety IntegratedFunction Manual, 12/2017, 6FC5397-4BP40-6BA1 47