What is the Backup FPGA Bug?

During recent internal development activities, it was discovered that a specific sequence of events could lead to an unintentional motor holding brake release due to corrupted firmware.

The condition may occur from the following sequence of events:

1. Initiate a user firmware file download (via Workbench or Fieldbus)
2. Interrupt the download process (for example by disconnecting the Ethernet cable)
3. The firmware may be corrupted due to the interruption
4. Power cycle the AKD (remove power, re-apply power)
5. If the firmware was corrupted, the AKD will power up using the Backup FPGA firmware

If items 1-5 occur, the Motor Brake will unexpectedly disengage. The reason for this behavior is an issue in the Backup FPGA firmware.