Commissioning, Operation, and Maintenance
‑87‑
Step
Action
Result
6
Test the STO1 or STO2 signal when the system is under
operation:
1. Awake the STO function by disconnecting both the STO1
and STO2 signals. Check whether the AC drive enters the
STO activated state and displays STO. In this case, the AC
drive immediately stops output. The motor then coasts to
stop based on the mechanical inertia.
2. Send a start command to the AC drive. Ensure that the AC
drive does not respond and the motor stays standstill.
3. The STO1 and STO2 channel signals are restored and the
system is restored to the normal state according to the
setting of F9‑79. Run the ON/RUN command on the AC drive,
and check whether the motor operates properly.
Test the STO1 channel signal when the system is under
operation:
1. Start the AC drive and ensure that the motor operates
properly.
2. Awake the STO function by disconnecting the STO1
channel signal. Check whether the AC drive displays the fault
code "E047.2". In this case, the AC drive immediately stops
output. The motor then coasts to stop based on the
mechanical inertia.
The STO1 channel signal is restored and the fault is cleared.
Run the ON/RUN command on the AC drive, and check
whether the motor operates properly.
Test the STO2 channel signal when the system is under
operation:
1. Start the AC drive and ensure that the motor operates
properly.
2. Awake the STO function by disconnecting the STO2
channel signal. Check whether the AC drive displays the fault
code "E047.2". In this case, the AC drive immediately stops
output. The motor then coasts to stop based on the
mechanical inertia.
The STO2 channel signal is restored and the fault is cleared.
Run the ON/RUN command on the AC drive, and check
whether the motor operates properly.
7
Record and sign the acceptance test report to prove that the
safety function is safe and the equipment can be put into
operation.
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