A Windows 10 PC running DOPSoft v2.0 reported NO RESPONSE FROM HMI over USB when connecting to a DOB-B07E415. The evidence identifies two distinct barriers: old HMI firmware can hide the USB communication-mode setting, while project upload can remain blocked by program protection even after communication is restored.
Enter the HMI System Menu
In the System Menu, inspectSystem Settings > MISC and the displayed PC–HMI communication interface.
Check USB Communication Mode
| Observed condition | Supported action or conclusion |
|---|---|
USB Commode is available on Windows 10 |
Select 2 (CDC), then retry the USB connection. |
USB Commode is absent |
Treat old firmware as the working diagnosis. The evidence also suggests testing from Windows XP or Windows 7 before updating firmware. |
| System Menu shows PC–HMI communication through COM1 | Use COM1 as the candidate path when Ethernet is unavailable, subject to confirming the correct RS-232 wiring and converter compatibility. |
The absence of USB Commode supports an old-firmware diagnosis, but it does not by itself prove that the physical USB port is defective.
Restore Communication by Updating Firmware
- For a DOB-B07E415 with an operational LAN port, connect through Ethernet and perform the firmware update.
- After the update, reopen the System Menu and confirm that the USB communication option is now present.
- Retry communication through USB or LAN. In the reported case, both interfaces worked after the Ethernet firmware update.
For a B07S415 without LAN and without the USB setting, the evidence points to COM1/RS-232 as the firmware-update path. However, it does not provide the required pinout, port settings, or proof that a particular RS-232-to-USB converter works. Obtain the correct wiring and communication settings for the exact HMI before connecting or updating it.
Separate Connectivity from Program Protection
A successful online connection does not guarantee that the application can be uploaded. After USB and LAN connectivity were restored on the DOB-B07E415, DOPSoft still could not retrieve the project because the HMI program was password-protected. The evidence provides no supported method to bypass that protection; recover the password or obtain the original project from its authorized owner.
FAQ
How do I fix NO RESPONSE FROM HMI on a DOB-B07E415 in Windows 10?
Enter the System Menu, open System Settings > MISC, select USB Commode 2 (CDC), and retry. If that option is missing, investigate old firmware and use an available Ethernet or confirmed serial update path.
How do I enter the DOB-B07E415 System Menu?
Can DOPSoft upload a password-protected HMI program?
Restoring USB or LAN communication does not remove project protection. The reported upload remained blocked by the program password, and the evidence provides no supported bypass procedure.