Siemens SINAMICS G120 Operating Instructions Manual page 281

Function after OFF2 – or the selection of the "Safe Torque Off" (STO) safety function
For the following signals, the brake closing time is not taken into account:
● OFF2 command
● After selecting the "Safe Torque Off" (STO) safety function
After these control commands, the inverter issues the signal to immediately close the motor
holding brake, independent of the motor speed.
Figure 8-27
Commissioning a motor holding brake
Danger to life due to falling loads
For applications such as lifting equipment, cranes or elevators, there is a danger to life if
the "Motor holding brake" function is incorrectly set.
• When commissioning the "Motor holding brake" function, secure any dangerous loads,
Precondition
The motor holding brake is connected to the inverter.
Converter with the CU250S-2 Control Unit (vector)
Operating Instructions, 06/2013, FW V4.6, A5E31759476B AB
Controlling the motor holding brake after an OFF2 command or selecting STO
DANGER
e.g. by applying the following measures:
– Lower the load down to the floor
– Cordon off the hazardous area so that nobody can enter it
Setting functions
8.7 Application-specific functions
281