ARINC-429 PXI Card Does Not Transmit Data On Low Speed

Updated Aug 24, 2026

Reported In

Hardware

  • Ballard ARINC-429

Issue Details

I am using an ARINC-429 OmniBus Card that is not transmitting data when I set it to 13.3 KHz using his Custom Device on VeriStand. 

If I set it to 100 KHz, it will transmit with no issue. 

What could I be doing wrong? 

Solution

Setting the minRate and maxRate properties to the same value for each message is the cause of this to happen. When using 100 kHz, it has enough timing resolution to meet the rate requirements, while at 13.3 kHz bitrate, the schedule builder can't satisfy those exact message rates and fails to build. 

To correct the issue, add some slack to the message rate to allow the schedule to deploy with all Tx and Rx channles set to 13.3kHz.  Setting the minRate and maxRate to +/- 1 of the desired rate is enought to allow it to deploy.  

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