The RS-485 commands for our aircraft Blu-ray player are in decimal.
The numbers are in sequence 28, 29, 30, 31, 32 … etc.
If they were in hex then the sequence would be 28, 29, 3A, 3B.
You can build a command by using the numbers on the Remote control image as listed in the Installation Manual. (As of Jan 2012, this was on Page 18 of said manual.)