STO
‑77‑
6.3 Fault Reset
The exceptional operation refers to the durations of power‑on and initialization, and
how to return from the STO state.
● The PWM buffer is disabled as the enable terminal is pulled up during power‑on,
so the PWM signal is inhibited.
● The PWM buffer is disabled as the enable terminal is pulled up during initialization
of the MCU, so the PWM signal is inhibited. Such condition is cleared and servo
drive works normally after initialization is done.
● When all of the following conditions are met, the servo system that enters the safe
state through the STO function can be back to normal with the safe state cleared
after auto‑reset of the drive.
■ The input state of the STO request must be "high".
■ The servo ON or servo RUN command must be inactive.
■ No dangerous faults exist.
Figure 6‑2 Return condition of servo ON/RUN command
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