Siemens Sinamics S120 Function Manual page 457

Ex ample trace: SDI positive (with encoder) with STOP A
①
Drive_1.r9713[0]: SI motion diagnostics position actual value load side, load-side actual value on the Control Unit
②
Deselect SDI positive
③
SDI positive active
④
Internal event
⑤
STO active
⑥
Enable pulses
Image A-11 Example trace: SDI positive (with encoder) with STOP A
Trace evaluation:
● Function SDI positive is activated (see bit "SDI positive active")
● The drive starts moving (time axis approx. -200 ms)
● Exiting the SDI tolerance window is detected (time axis 0 ms)
● Safety messages are initiated (time axis 0 ms; bit "internal event" is set to 0)
● Error response STOP A is initiated (time axis 0 ms; bits "STO active" and "Pulse enable"
are set to 1)
● The drive coasts to a standstill or a configured holding brake is closed
Safety Integrated
Function Manual, (FHS), 07/2016, 6SL3097-4AR00-0BP6
A.3 Acceptance tests (recommendations)
Appendix
457