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BQ27742-G1 + Battery Management Studio learning cycle problem

Artur Tynecki
Prodigy 30 points
Other Parts Discussed in Thread: BQ27742-G1, EV2400, BQSTUDIO

Hi,

I have a problem with  the completion of learning cycle when working with BQ27742-G1 + EV2400 +

Battery Management Studio (v. 1.3.9). After discharging, during at the end of the relaxation time program reports an error and stops working:

BMS starts as administrator on Windows 7.

Has anyone met with such a problem early? Any solutions?

Thanks for help.

  • 0
    TI__Genius 14985 points
    Please try the latest version (currently 1.3.31) of bqStudio and see if that fixes your problem:
    http://www.ti.com/tool/bqstudio
  • 0 in reply to dMax
    Prodigy 30 points

    The latest version of bqStudio caused a new problem:

    During learning cycle at the end of relaxing time, I receive a message:

    After that I try activate IT algorithm, but this operation nothing changes. Should I do it earlier?

    The registers in lerning cycle are:

  • 0 in reply to Artur Tynecki
    TI__Guru* 76230 points

    Hi Artur

    The image shows that your inv_chksum bit is set in your safety status. This means that your charge and dishage fets will be disabled until your checksum is programed correctly. Use the check sum command 0x001A to read the correct checksum and then program on your device. Make sure the MSB of the checksum is set to zero. Refer to page 45 of the techical reference manual. ( TRM) of the device.

    Also, before you start learning using the plugin, make sure to send the IT command. The plugin doesn't do that for you.

    thanks

    Onyx

  • 0 in reply to Onyx Ahiakwo
    Prodigy 30 points

    Thank you Onyx,

    I change the inv_chcksum bit and now fets are enable. But I expect that after send IT_ENABLE commands from commands box, bit: VOK and QEN in control status should be set.  Unfortunately, it does not  happen either before or during the learning cycle. What else should I do to enable IT?

  • 0 in reply to Artur Tynecki
    TI__Guru* 76230 points

    Hi Artur

    if your static_chem_checksum is wrong that will prevent Qen  from being set after IT enable command is sent. Program your chem id on your chip using bqstudio. This will fix the issue and IT command will now work.

    thanks

    Onyx