Support

 Excessive PDO count in the PLC has caused an overly high task load rate. Deleting unnecessary PDOs will resolve the issue.

 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.

GD350 supports software programming via RS485 in software versions 6.00 and above.

1. From the perspective of program editing: Use polling to trigger the ModbusRTU communication read and write instructions. For read and write instructions, use the rising edge trigger (↑) to avoid continuous reading and writing occupying the channel.
2.  From the perspective of communication settings: Change the communication timeout of the PLC (the default communication timeout for some models is 1000ms) to avoid cumulative delays in communication information transmission due to multiple communication timeouts.

The GD350-19 does not have an expansion card supporting BACnet IP communication. A multi-function expansion card incorporating BACnet IP and other communication protocols is currently under development and is expected to be available in 2026.

Model: IPE300-090G-4

Application condition: Ordinary speed regulation of washing machine. 

Fault phenomenon: After the VFD is powered on, the display screen flashes once and then goes out, repeating the cycle. 

How to solve it?

Reason analysis: 

The static measurement main circuit is intact. Measure that there is no 10V or 24V voltage at the motherboard terminals when powered on. Disassemble and inspect the U-phase circuit of the drive board. There is a voltage regulator tube that has changed color. Check for abnormal IGBT junction capacitance corresponding to phase U. Analysis shows that the short circuit at the IGBT trigger end resulted in the protection of the switch power supply on the drive board. 

Solution:

 Replace with a new driver board and U-phase IGBT. 

Improvement effect: 

The motherboard displays normally and the motor runs normally.