RS-422 Full Duplex not working in Rx

rreignier
rreignier New Member Posts: 67 ✭✭
in UP Xtreme Troubleshooting and FAQs

Hi,

On our Up Xtreme, we want to use the two COM connectors in RS-422 mode.
After configuring the BIOS and following the pinout found in the Quick Installation Guide:
COM port pinout

We have managed to send some RS-422 Full Duplex frames using the TX- and TX+ pins but when receiving frames on RX- and RX+ there is only garbage received.

We have checked the signals with a scope, they are clean an the scope is able to correctly decode them in both directions.

@DCleri could you please confirm the pinout and that the RS-422 is functional in both directions with current BIOS?

Could we have the pinout of the DB9 connector on the chassis to confirm the correct wiring please.

Thanks.

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Comments

  • rreignier
    rreignier New Member Posts: 67 ✭✭

    Up ;)
    @DCleri

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  • DCleri
    DCleri Administrator, AAEON Posts: 1,213 admin

    Hi @rreignier

    Thanks for the reminder, we are checking internally with the hardware and bios teams to provide you an answer asap

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  • rreignier
    rreignier New Member Posts: 67 ✭✭

    Hi @DCleri
    Thanks a lot for working on this.
    Looking forward to hearing from you.

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  • rreignier
    rreignier New Member Posts: 67 ✭✭

    Hi
    Did you have a moment to try the RS-422 in both directions on UpXtreme @DCleri?
    Thank you.

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  • DCleri
    DCleri Administrator, AAEON Posts: 1,213 admin

    Hi @rreignier

    No we haven't any update on this yet.
    I will keep you posted as soon as I have any update.

    Thanks for checking

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  • rreignier
    rreignier New Member Posts: 67 ✭✭

    Hi!

    Is the RS-422 on UpSquared Pro as broken as on the Xtreme?
    Because before buying the UpSquared Pro I do not want to be as disappointed as for the Xtreme.

    Thanks

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  • rogertsai(AAEON)
    rogertsai(AAEON) New Member Posts: 350 ✭✭✭

    @rreignier
    I tested and didn't see any issues with RS-422. So, please provide more information about your application environment for our further verify. Also please double check the information below

    • BIOS Ver is R1.8 (UPW1AM18)
    • "Use this Device" to Enabled and Set RS-422 mode for serial port 1 and 2 in BIOS. (Advanced\SIO Configuration\Serial Port X\Mode)
    • Make sure that your COM port device is detected and no conflicts, no yellow exclamation mark issue in device manager
    • To RS-422 test if the Up Xtreme COM port is functioning correctly, you can do a simple loopback test to check whether the link between the two com port works normally. For example, COM1 TX- to COM2 RX-, COM1 TX+ to COM2 RX+, COM1 RX- to COM2 TX-, COM1 RX+ to COM2 TX+
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