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Here is a detailed description of the settings for implementing automatic restart after power recovery according to the technical documentation:
1. Main Auto-Start Parameter
F07.06 — Selection of restart action after power failure. This parameter defines how the drive will behave when the voltage disappears and then reappears:
0: Off (Deactivated / Disabled) — Factory default setting. The drive will not start automatically after power is restored.
1: Start with speed tracking — Recommended mode. The drive will first detect the motor speed and rotation direction (if it is still rotating by inertia), then smoothly pick it up. This prevents shocks and overcurrent errors if the motor is still spinning.
2: Start according to the start mode — The drive will begin operation as configured in parameter F07.00 (for example, from zero frequency or with braking).
To enable automatic start, set: F07.06 = 1 (or 2, depending on the nature of the load).
2. Time Delay Parameter
To stabilize the network voltage before starting, a wait time parameter is used.
F07.07 — Restart wait time after power failure.
Range: 0.00 ~ 60.00 s.
Factory default: 0.50 s.
Description: This is the time the drive waits after the voltage is restored before issuing the start command. If your network is unstable at power-on, this time can be increased.
3. Additional Features for Short-Term Voltage Drops (Optional)
If the voltage disappears only briefly (sags) to avoid a "Lu" error (under-voltage) and shutdown, you can configure the under-voltage suppression function:
F10.16 — DC bus under-voltage suppression function. Set to 1 (Enabled). The drive will automatically adjust the frequency to maintain bus voltage using regenerative energy from the motor.
F10.17 — Under-voltage suppression activation point: defines the voltage threshold for activating this function (for 380 V models usually about 430 V).
⚠️ Warning! Safety: Activating parameter F07.06 means that the equipment will start operating independently and unexpectedly for personnel immediately after power is supplied. Make sure this does not pose a safety risk to people or machinery and place appropriate warning signs near the equipment.