SATO CT410 - Manual (Page 149)

Form Overlay Status (SOH + FO)
Upon Receipt of an SOH (hexadecimal 01) followed immediately by an FO
(hexadecimal 464F) causes the printer to return a 18 byte Form Overlay Status Word
bounded by an STX-ETX pair that reports the Forms downloaded into the printer.
BYTE
NUMBER
VALUE DESCRIPTION
1-2 01 to 09 Form Registration Number (ASCII value)
3-18 ASCII Form Name
Section 5. Interface Specifications
SATO CT Series Printers 900106 9A Page 5-15