Siemens Sinamics G120 Function Manual page 232

Operation
6.3 Safe Torque Off (STO)
6. Select the "STO via Power Module terminals" function.
The inverter carries out a forced checking procedure (test stop).
7. Deselect the "STO via Power Module terminals" function.
8. Check that neither fault F01600 nor F30600 with fault value r0949 = 1030 is active.
You have acknowledged the discrepancy message, and switched on the motor again.
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Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
Function Manual, 01/2017, FW V4.7 SP6, A5E34261271B AD