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If power is supplied to the drive to put it in standby mode, and then an external power source is connected to its output terminals (U/V/W), what will happen?

A: This is a strictly prohibited operation. It will cause a serious fault and will immediately damage the drive. The most direct consequence is the burnout of the inverter module (IGBT) inside the drive and its driver circuit. Therefore, it is forbidden to connect any commercial power source (or any voltage source) directly to the U/V/W output terminals of the drive.

The GD20 frequency converter reports an ItE fault. The customer measured the diode voltage drop of the main circuit and the inverter circuit using a multimeter, and found that it was normal. The IGBT power module was intact and there was no breakdown or short circuit problem. After powering the frequency converter alone, the device immediately triggered the ItE current detection fault alarm. After replacing the brand-new control board, the ItE fault was eliminated, and the three-phase output of the frequency converter was restored and operating normally. When encountering an ItE fault, the following steps can be followed for investigation and repair:

1. Check the connection status of the wiring between the control board and the driver board, and re-plug to confirm the reliability of the contact

2. Confirm that the phase sequence of the Hall cables U/V/W is completely matched with the phase sequence on the driver side; check that the Hall pins are not offset and are securely plugged; if there are no abnormalities, directly replace the Hall sensor for testing

3. Disconnect the power line of the motor on the frequency converter side, and power on the frequency converter alone. If no more faults are reported, it is determined to be a problem on the motor/lower load side

4. Replace the intact driver board for verification

5. Replace the intact control board for verification

This is the test mode for the keyboard control board. Pressing “PRG” and “ENT” simultaneously activates it. It is a method we use during debugging to verify whether the control board is functioning properly. Simply power cycle the device to exit test mode.

Q: How do I configure parameters to switch from PV control or three-phase utility power to single-phase utility power for single-phase output?
A: First, set parameter P15.00 to 0 to disable the PV function, ensuring the SP100 is powered by mains frequency. Set P15.39 to 0 to change the product model to single-phase power supply with single-direction output (this function code can also be used to switch the product model to match different input/output configurations). After verifying the wiring is correct, power on and start the system.

The baud rate specified in the manual is 115200, but in practice, it works after changing the baud rate to 230400, allowing normal display and successful burning.

 When P11.01 is enabled and a transient power-off occurs, bit 9 is set to 1 when the bus voltage is lower than the following values: 460VDC for 380VAC models; 240VDC for 220VAC models.

What are the differences and triggering conditions between P11.01 (Frequency drop at transient power-off)   and P11.16 (Automatic frequency-reduction during voltage drop) on GD28 drive?

Solution:

When P11.01 is enabled, in the event of a short-term bus voltage drop, the VFD will reduce its output frequency to brake the motor, in motor brake status, it will generate energy to maintain the bus voltage.

When P11.16 is enabled, when the bus voltage decreases, the VFD's output frequency will decrease synchronously. This applies to both VF and vector modes.

For the GD350A, versions 6.09/6.10 and 3.09/3.1 can be used directly with EtherCAT communication expansion cards without requiring the burning of dedicated communication software.

Control boards running version 6.09 or higher are different from those running 6.08 or lower. Control boards with 6.08 or earlier cannot be flashed with 6.09 or 6.10 software. Similarly, control boards running 6.09 or higher cannot be flashed with software versions 6.08 or earlier.