RS-422 Full Duplex not working in Rx

rreignier

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:

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.

rreignier

Up
@DCleri

DCleri

Hi @rreignier

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

rreignier

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

rreignier

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

DCleri

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

rreignier

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

rogertsai(AAEON)

@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+