SATO XL400/410 - Manual (Page 99)

Programming Manual 2. Command Codes
SATO RISC Printers 99
Memory Card Option Commands
These commands require the Memory Card Option.
Note: Before a Memory Card can be used for the first time, it
must be initialized using the BJF command. If it is
not initialized, the printer will not recognize the card and
respond as if no card was installed.