Epson GT-6500 EN - Manual (Page 106)

ESC S Request condition
Format: B1 B2 B3 B4 B5 A5
Command:ASCII: ESC S
Decimal: 27 83
Hexadecimal: 1B 53
Parameter: (none)
Handshaking:
1 ESC S command
2 Data block
Explanation:
This command asks the scanner to send back a data block that
contains the current parameter values set in the scanner.
The structure of returned values is identical to the structure of the
command parameters. The number of command functions included in
the data block depends on the function level and the model of the
scanner.
Contents of the ESC S (condition) data block
The contents of the ESC S data block are listed by model in Appendix
B.
3-12 Command Reference