Prerequisite For Sto Use; Commissioning Sto; Commissioning Tools - Siemens SINAMICS G120D Original Instructions Manual

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.
8.9.2

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.
8.9.3

Commissioning STO

8.9.3.1

Commissioning tools

We strongly recommend that you commission the safety functions using a PC tool.
If you use a PC tool for commissioning, then you set the functions using the graphic screen
forms and you do not have to work with parameters. In this case, you can ignore the
parameter tables in the following sections.
Table 8- 30
Tool
STARTER
Startdrive
Commissioning the safety functions with STARTER is subsequently described.
A tutorial is available for Startdrive: Startdrive tutorial
(http://support.automation.siemens.com/WW/view/en/73598459).
Converter with control units CU250D-2
Operating Instructions, 04/2014, FW V4.7, A5E34261542B AA
PC-based commissioning tools
Can be downloaded at no
charge
STARTER
(http://support.automation.sieme
ns.com/WW/view/en/10804985/1
30000)
Startdrive
(http://support.automation.sieme
ns.com/WW/view/en/68034568)
8.9 Safe Torque Off (STO) safety function
Possible solution
Wire the Emergency Stop button to a fail-
•
safe input of the inverter.
Select STO via the fail-safe input.
•
Evaluate the Emergency Stop button in a
•
central control.
Select STO via PROFIsafe.
•
Order number
6SL3072-0AA00-0AG0
6SL3072-4CA02-1XG0
Setting functions
239