Facing Problem in the communication of Wago plc 750-8112 with the weintek HMI

Hi everyone,

I am trying to establish communication between a WAGO 750-8112 PLC and a Weintek cMT2108X2 HMI, but I am unable to get stable communication working.

PLC Details:

• WAGO 750-8112
• Firmware Version: 28

What I have done so far:

1. Created and updated the latest Symbol Configuration in my PLC project.
2. Downloaded the project to the PLC.
3. In Weintek EasyBuilder Pro, I imported the PLC tags from the Symbol Configuration.
4. Configured the PLC connection using WAGO TCP/IP.
5. Set:
   • IP Address of PLC correctly
   • Port: 11740
   • Username: admin
   • Password: wago
6. Downloaded the HMI project successfully.

Current behavior:

• The HMI continuously shows “Device No Response”.
• When I create a simple BOOL variable and connect it to a toggle button on the HMI, the PLC bit actually turns ON and OFF correctly.
• However, even while the bit is changing, the HMI still displays “Device No Response”.
• When I try to display variable values (for example numeric or other PLC variables), the HMI does not show the values and continues reporting “Device No Response”.

Because the bit can be written from the HMI, it seems there is at least some communication happening, but reading variables and stable communication are not working correctly.

Has anyone successfully connected a WAGO 750-8112 (Firmware 28) with a Weintek cMT2108X2 HMI? Are there any special settings required in the PLC, Symbol Configuration, user permissions, communication driver selection, or port configuration?

Any suggestions would be greatly appreciated.

Thank you!