Safe Operating Stop (Sos) - Siemens Sinamics S110 Function Manual

Safety Integrated Functions
8.5 Extended Functions
8.5.3

Safe Operating Stop (SOS)

Description
This function serves for failsafe monitoring of the standstill position of a drive.
Personnel can enter the protected machine areas without having to shut down the machine
as long as SOS is active.
Drive standstill is monitored by means of an SOS tolerance window (p9330 and p9530). The
SOS function is activated after SOS is selected and when the delay time set in p9351/p9551
expires. The drive must be braked to standstill within this delay time (e.g. by the controller).
Any delay time is cleared after SOS is canceled and the drive can start up immediately.
Figure 8-5
Responses
Standstill tolerance violated in p9330/p9530:
● STOP B with subsequent STOP A
● Safety message C01707/C30707
System errors:
● STOP F
● Safety message C01711/C30711
312
Standstill tolerance
Function Manual, 10/2008, 6SL3097-4AB10-0BP0
Drive functions