Siemens Sinamics G120 Function Manual page 225

Switching on the motor once STO is active
Procedure
To switch on the motor again once STO is active, proceed as follows:
1. Deselect STO.
2. After deselecting STO, wait until the inverter is "ready to switch on".
Alternatively: After deselecting STO, wait a certain time before switching on. We
recommend a wait time of 200 ms.
3. Switch on the motor: ON/OFF1 = 1.
You have switched on the motor.
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
Function Manual, 01/2017, FW V4.7 SP6, A5E34261271B AD
Operation
6.3 Safe Torque Off (STO)
225