Support

 After enabling the multi-turn mode, the customer expects the R0.25 value to continue increasing beyond 32,767 revolutions, but in practice it does not increase continuously. 

Solution:

R0.25 represents the actual encoder's multi-turn value. This 16-bit value is hard-coded and cannot be modified. However, with the multi-turn mode activated, the cumulative position feedback value stored in R2.05 persists even after power loss following a multi-turn overflow. This ensures the absolute position is preserved and not lost during power failure."

 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.