The Channel/Bank Number is an index representing multiple devices on the same board. For example, a 1553 board can have multiple dual redundant channels and each 1553 channel is considered a “device” by the API.
For ARINC a “Bank” of channels is considered a “device” – a Bank usually consists of 8, 14 or 16 ARINC channels. There are typically one or two banks per card and the value for Bank 1 would be zero and Bank 2 would be one.
For more details, refer to the discussion of The Device Identifier (Device ID – or DEVID) in the AltaAPI Users Manual:
https://www.altadt.com/wp-content/uploads/dlm_uploads/2014/04/AltaAPI-Users-Manual.pdf
