Siemens SINAMICS G120 - Selecting and Deselecting STO When the Motor Is Switched on

6.3.2 Selecting and deselecting STO when the motor is switched on
Select STO
Function
1. The machine control selects the STO safety function via a fail-safe digital input or via
PROFIsafe.
2. The inverter then safely switches off the motor torque.
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Figure 6-9 Time response of the STO safety function (Safe Torque Off)
Inverter signals Parameters Included in the PROFI‐
safe telegram
Can be interconnec‐
ted with
F-DI F-DO
STO active (basic functions) r9773.1 ✓ --- ✓
STO deselection (basic functions) r9773.0 ✓ ✓ ---
STO active (extended functions) r9722.0 ✓ --- ✓
Deselect STO (extended functions) r9720.0 ✓ ✓ ---
Ready to switch on r0052.0 --- --- ---
ON/OFF1 r0054.0 --- --- ---
Operation
6.3 Safe Torque Off (STO)
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
224 Function Manual, 01/2017, FW V4.7 SP6, A5E34261271B AD