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Q : How to fix lagging HMI data when GD20-7R5G-4 drives a polishing machine?
A: GD20-7R5G-4
Application: polishing machine.
Fault phenomenon: The VFD operation data displayed on the HMI is lagging and the response is slow.
How to solve it?
Reason analysis:
Sort out the on-site control logic: PLC reads the operation data of 3VFDs through 485 communication, and then sends it to the HMI for display.
Check that multiple 485 communication lines and motor cables are bundled together in the electrical cabinet. Check that the VFD is well grounded.
Solution:
Organize the cables and keep the 485 communication cable away from the motor cable to prevent interference.
Optimize the carrier frequency P00.14 to reduce external interference caused by VFD.
Install collision rings on communication cables to enhance the anti-interference ability of signal cables.
Improvement effect: interference elimination, smooth data display on the HMI.
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