1. First click the "Accessible Devices" button above to scan out the currently connected PLC.
2. Click "Display", the connected PLC can be displayed in the right directory tree, and click "Online and Diagnosis".
3. The firmware version and the Botu software version used by the last user can be displayed.
4. Open the "Online and Diagnostics" view of the connected S7-1200 and switch to the "Online" mode.
5. Select "Firmware Update" from "Features" and click the "Browse" button to navigate to the location containing the firmware update file.
6. After browsing to the latest version of firmware, click the "Run Update" button to execute the CPU firmware update operation.
7. A progress dialog will be displayed while the firmware update is loading. After the firmware update is complete, a dialog prompts to start the module with the new firmware.
8. After completion, you can update the device firmware version and PLC version V4.4. Try hardware connection and software download again.
