Siemens Sinumerik 840D sl Function Manual page 48

System Features
3.5 Safety information & instructions and residual risks
Warning
!
S Safety Integrated is only activated if all of the system components are
powered--up and have been booted.
S Faults in the absolute track (C--D track), cyclically interchanged phases of
motor connections (V--W--U instead of U--V--W) and a reversal in the control
direction can cause an increase in the spindle speed or axis motion. Category 1
and 2 Stop functions according to EN 60204--1 (defined as Stop B to E in
Safety Integrated) that are provided are however not effective due to the fault.
Category 0 stop function according to EN 60204--1 (defined as Stop A in Safety
Integrated) is not activated until the transition or delay time set via machine
data has expired. When SBR is active, these faults are detected (STOP B/C)
and the Category 0 stop function according to EN 60204--1 (STOP A in Safety
Integrated) is activated as early as possible irrespective of this delay (see
Chapter 6.4, "Safe Acceleration Monitoring"). Electrical faults (defective
components etc.) can also result in the response described above.
S 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 been successfully completed.
S When no user agreement has been given (see Chapter 5.4.4, "User
agreement"), the safe software limit switches (SE) are not operative; the safe
software cams or cam tracks (SN) are operative, but are not safe as defined by
Safety Integrated.
S The simultaneous failure of two power transistors (one in the upper and the
other offset in the lower inverter bridge) in the inverter may cause the axis to
move briefly.
The maximum movement can be:
Synchronous rotary motors: Maximum movement = 360_ / pole number
Synchronous linear motors: Max. movement = pole width
Example: Synchronous motor:
For a 6--pole synchronous motor, the axis can move by a maximum of 60
degrees. With a ballscrew that is directly driven by, e.g. 20 mm per revolution,
this corresponds to a maximum 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. This corresponds to the following distances:
1FN1--07
1FN1--12/--18/--24
1FN3
3-48
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
27 mm
36 mm
20 mm
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