Safe Torque Off, Sto - Siemens SINAMICS G120 Function Manual

Description

2.4 Safe Torque Off, STO

2.4 Safe Torque Off, STO
STO functions as follows:
● The operator activates the STO safety function via a fail-safe input or via PROFIsafe
● The inverter cuts off the motor torque.
● To switch the motor on again, you have to first deactivate STO and then specify the ON
Diagnostics of the safety functions
● Bit r9773.1 indicates the status of the motor.
● The yellow "SAFE" LED on the front of the Control Unit indicates that one of the safety
● When the "SAFE" LED flashes slowly, this indicates that one of the safety functions (in
20
(safe bus communication).
command again.
Figure 2-2 Dynamic response of STO (Safe Torque Off)
Bit 0 in PROFIsafe status word 0 has the same function.
functions (in this case, STO) has been enabled.
this case, STO) is currently active.
Safety Integrated Function Manual, SINAMICS G120
Function Manual, 07/2010, FW 4.3.2, A5E03052391B AA