Commissioning Sto; Safety Functions Password - Siemens SINAMICS G120 Operating Instructions Manual

Advanced commissioning
6.17 Safe Torque Off (STO) safety function
Action:
Classic solution:
Solution with the STO
safety function inte‐
grated in the drive:
Prerequisite for STO use
In order to use the STO safety function, the machine manufacturer should have already
performed a risk assessment, e.g. in compliance with EN ISO 1050, "Safety of machinery -
Principles of risk assessment". The risk assessment must confirm that the inverter is permitted
for use in accordance with SIL 2 or PL d.
6.17.2

Commissioning STO

We recommend that you commission the safety functions using the STARTER or Startdrive
PC tool.
6.17.2.1

Safety functions password

What is the purpose of the password?
The password protects the settings of the safety function from being changed by unauthorized
persons.
246
EMERGENCY SWITCHING OFF
Not possible.
STO is not suitable for switching off a
voltage.
Tools to commission the inverter (Page 126)
EMERGENCY STOP
Stop Category 0 according to
EN 60204‑1
Switch off the drive power supply
It is not necessary to switch off the
voltage to minimize risk.
Converter with the CU250S-2 Control Units
Operating Instructions, 04/2018, FW V4.7 SP10, A5E31759476B AG
Select STO