Fuji Electric FRENIC-Lift LM2C Series - Inverter Output State When Safe Torque off (STO) Is Activated

8-9
8.6.3 Inverter output state when Safe Torque Off (STO) is activated
Turning the emergency stop button ON turns EN1 and EN2 OFF, bringing the inverter into the Safe Torque Off
(STO) state.
Figure 8.6 shows the timing scheme to apply when the emergency stop button is turned OFF with the inverter
being stopped. Input signals to EN1 and EN2 become ON, making the inverter ready to run.
Figure 8.6 Inverter Output State when the Emergency Stop Button is Turned OFF with the Inverter Being stopped
Input to EN1
/EN2
Run
Run command
Inverter output
ON
OFF
Wait for a run
command
Running
Emergency stop
button
OFFON
Stop
Safe Torque Off
（STO)
Stop
ON
Safe Torque Off
（STO
)
OFF
Wait for a run
command