Prerequisite For Sto Use; Commissioning Sto; Commissioning Tools - Siemens SINAMICS G120C Operating Instructions Manual

Advanced commissioning
6.8 Safe Torque Off (STO) safety function
Application examples for the STO function
The STO function is suitable for applications where the motor is already at a standstill or will
come to a standstill in a short, safe period of time through friction. STO does not shorten the
run-on of machine components with high inertia.
Examples
When the Emergency Stop button is pressed, a
stationary motor should not unintentionally start.
A central emergency stop button must prevent the
unintentional acceleration of several motors that
are at a standstill.
6.8.2

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.
6.8.3

Commissioning STO

6.8.3.1

Commissioning tools

We strongly recommend that you commission the safety functions using a PC tool.
Table 6- 43
Download
STARTER
(http://support.automatio
n.siemens.com/WW/vie
w/en/10804985/130000)
Startdrive
(http://support.automatio
n.siemens.com/WW/vie
w/en/68034568)
262
PC-based commissioning tools
Article number
6SL3072-0AA00-0AG0
6SL3072-4CA02-1XG0
Possible solution
Wire the Emergency Stop button to a safe-
•
ty-related input of the inverter.
Select STO via the safety-related input.
•
Evaluate the Emergency Stop button in a
•
central control.
Select STO via PROFIsafe.
•
More information
STARTER videos
(http://www.automation.siemens.com/mcms/m
c-drives/en/low-voltage-inverter/sinamics-
g120/videos/Pages/videos.aspx)
Tutorial
(http://support.automation.siemens.com/WW/
view/en/73598459)
Operating Instructions, 07/2015, FW V4.7 SP3, A5E34263257B AC
SINAMICS G120C converter