Epson GT-6500 EN - Manual (Page 60)

Command Order
By using the Request ID (ESC I) command, you can determine the
scanner model. This allows you to create software that sends only the
commands featured on that particular model. Always check the
scanner ID before making settings with software commands.
The ID information consists of the following:
❏ The scanner function level
❏ The available scanner resolutions
❏ The maximum scannable area
The maximum resolution and maximum scannable area values are
used to determine the available parameters in the Set scanning area
(ESC A) command when zoom and resolution are changed.
ID information
1. Scanner function level
The scanner level indicates which commands are supported on the
connected scanner, allowing you to make full use of the scanner’s
features. You also can determine which commands are not available,
so you can avoiding causing command errors.
2. Available resolutions
All scanning resolutions available on the connected scanner are listed
in the ID information. All resolutions are available for both the main
scan and sub scan; the main scan and sub scan values can be set
independently from each other. The last resolution value is the highest
resolution available on the scanner.
2-22 Command Usage