Translations:WB Modbus Devices Firmware Update/5/en

The device enters bootloader mode if:

• the device has the correct firmware — the first 2 seconds after power on, the device operates in bootloader mode;
• the device does not have the correct firmware (for example, there was a failure when updating the firmware) — in this case, the bootloader mode is constantly active;
• when the main program in the holding-register 129 (0x81) was recorded 1 — in this case, the device is rebooted and remains in bootloader mode for 120 seconds.