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I/O Modules - Bootloader - Problem of the module falling into the bootloader mode

Issue

The I/O modules go into a state in which they cannot be communicated with in any way, the COMM and ON LEDs flash alternately and when connected to the iSMA Configurator it shows a message about being in the bootloader state.

image-20240923-081144.png

Possible solution

  1. Check DIP switches whether they are not all in the ON state.

  2. Check whether a command is sent to Modbus address 0 from Write register 0 for the value 0x04FF (decimal 1279) or Modbus function 0x5A (decimal 90). Such registers can be sent in special cases:

    1. global operations (broadcast) to many devices at once,

    2. special operations requiring non-standard functions, such as the 0x5A function,

    3. change of device’s settings or state, where the 0 register is responsible for key operating parameters, while the 1279 value has a specific meaning for the device.

  3. Follow the below procedure:

    1. close iSMA Configurator if opened,

    2. switch off power supply (along with the USB cable)

    3. switch all DIP switches to ON and rotary switches to 0 as below:

      image-20241023-104950.png


    4. bring back power supply with USB - COMM and ON LED diodes should start blinking alternately,

    5. start iSMA Configurator (update process should start),

    6. by the end of the update process, set any DIP switch to OFF for the device to leave the bootloader mode. Otherwise, the update process will loop indefinitely.