Safe Operational Stop (Sos) - Siemens SINAMICS S120 Function Manual

Extended Functions

4.3 Safe Operational Stop (SOS)

● Safety message C01711/C30711
Overview of important parameters (refer to the List Manual)
● p1135 OFF3 ramp-down time
● p9301 SI motion enable safety functions (Motor Module)
● p9501 SI motion enable safety functions (Control Unit)
● p9330 SI motion standstill tolerance (Motor Module)
● p9530 SI motion standstill tolerance (Control Unit)
● p9348 SI motion SBR actual speed tolerance (Motor Module)
● p9548 SI motion SBR actual speed tolerance (Control Unit)
● p9352 SI motion transition time STOP C to SOS (Motor Module)
● p9552 SI motion transition time STOP C to SOS (Control Unit)
● r9722 CO/BO: SI motion, integrated drive status signals
4.3 Safe Operational 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 on expiration of the delay time set in p9351/p9551 after SOS is
selected. The drive must be ramped down to a standstill within this delay time. Any delay
time is cleared after SOS is canceled and the drive can start up immediately.
Figure 4-3
Responses
Standstill tolerance violated in p9330/p9530:
● STOP B with subsequent STOP A
42
Standstill tolerance
Function Manual, (FHS) , 07/2007 Edition, 6SL3097-2AR00-0BP0
Safety Integrated