Popular Searches:
Q : What should I do if the HMI is connected to GD300-21 and the display communication fails?
A: First of all, ensure that the wiring is correct. HMI and GD300-21 are connected through RS485 interface, please refer to the wiring diagram for correct wiring;
Secondly, check whether the Modbus communication parameters (P14.00~P14.02) of GD300-21 have been modified, usually use the default value.
Finally, you can also enter the HMI setting interface to confirm whether the COM port settings are correct.
More Resources
Services
Learn about INVT’s global after-sales policies, service processes, and technical support commitment.
Learn More
Downloads
Get product catalogs, manuals, drawings, software, certificates, and more.
Download Now
Training Videos
Learn product knowledge, operation guides, and application technologies through online training videos.
Learn More
Inquiry
TOP
Popular Searches:
Repair Progress Tracking | Identity Verification
To protect your repair information, please verify using the mobile number reserved on the service order.
Verify with the reserved mobile number
Verify
SMS Verification Code *
If you cannot receive the code, please contact the after-sales hotline. 400-700-9997
Contact INVT
Get in touch with INVT. Our team will get back to you shortly.
Full Name *
Company Name *
Email Address *
Phone Number *
Country *
City
Inquiry Type *
Product Category *
Select the product you're interested in.
-
Industrial Automation
-
Network Power
-
PV & ESS
-
e-Mobility
Your Message / Requirements *
I have read and agree to INVT Privacy Policy and Terms of Use
Captcha *
