Epson GT-6500 EN - Manual (Page 96)

Summary of the Scanner Commands
Five types of scanner commands are used with EPSON scanners. In
addition, four control codes are used for handshaking. The five
command types are:
Execution: Requests the scanner to send
back data
Data form definition: Specifies the format of data to be
sent from the scanner
Image definition: Sets image modes
Image processing: Specifies any enhancement
processes to be used
Auxiliary: Helps control the scanner
Execution commands
These commands obtain data from the scanner.
Request ID ESC I
Request status ESC F
Request extended status ESC f
Request condition ESC S
Start scanning ESC G
Data form definition commands
These commands specify the format of image data and data transfer.
Set color ESC C
Set data format ESC D
Set resolution ESC R
Set zoom ESC H
Set scanning area ESC A
Set data order ESC K
3-2 Command Reference