Technical data

Safety Integrated Functions
8.3 System features
Function Manual
352 Function Manual, 06/2012, 6SL3097-4AB10-0BP4
Overview of important parameters (see SINAMICS S110 List Manual)
● p0799[0...2] CU inputs/outputs sampling time
● p9500 SI Motion monitoring clock cycle (processor 1)
● p9511 SI Motion actual value sensing clock cycle (processor 1)
● p9586 SI Motion delay time of the evaluation, encoderless (CU)
● p9651 SI STO/SBC/SS1 debounce time (processor 1)
● p9652 SI Safe Stop 1 delay time (processor 1)
● r9780 SI monitoring clock cycle (Control Unit)
8.3.6 Residual risk
The fault analysis enables the machine manufacturer to determine the residual risk at his
machine with regard to the drive unit. The following residual risks are known:
WARNING
Due to the intrinsic potential of hardware faults, electrical systems are subject to additional
residual risk, which can be expressed by means of the PFH value.
WARNING
• Faults in the absolute track (C-D track), cyclic interchange of the drive phases (V-W-U
instead of U-V-W) and reversal of the control direction may cause acceleration of the
drive. Due to the fault, however, Category 1 and 2 stop functions to EN 60204-1 (fault
response functions STOP B to D in accordance with Safety Integrated) are not effective.
Stop function Category 0 to EN 60204-1 (fault response function STOP A in accordance
with Safety Integrated) is not triggered until after the transition or delay time set in the
parameter has elapsed. These faults are detected when SAM is selected (fault response
functions STOP B/C) and stop function category 0 in accordance with EN 60204-1 (fault
response function STOP A in accordance with Safety Integrated) is triggered as early as
possible regardless of this delay. Electrical faults (defective components or similar) may
also lead to the response stated above.
• Simultaneous failure of two power transistors (one in the upper and the other offset in
the lower inverter bridge) in the inverter may cause brief movement of the drive,
depending on the number of poles of the motor.
Maximum value of this movement:
Synchronous rotary motors: Max. movement = 180° / no. of pole pairs