Siemens SINAMICS G120 Function Manual page 47

If you switch the motor off with the OFF2 command when the SDI safety function is active,
the inverter immediately switches off the motor (STO). Depending on the selected setting,
the inverter immediately safely switches off the motor torque (STO).
Figure 2-21 OFF2 command when the SDI safety function is active
You must proceed as follows in order to switch on the motor again after the SDI function has
been deselected:
● Deselect the SDI safety function.
● If you switched off the motor with one of the OFF2 or OFF3 commands, then deselect the
● Switch off the motor with the ON/OFF1 command and then switch on again.
Safety Integrated Function Manual, SINAMICS G120 and G120C
Function Manual, 01/2011, FW 4.4, A5E03052391B AB
corresponding command.
Description
2.6 Safe Direction (SDI)
45