Epson GT-9500 [21/54] Identity request

7/8/96-B 19

4.6 Control codes

Identity request

(1) Code: ESC I

ASCII: ESC I

decimal: 27, 73

hexadecimal: 1B, 49

(2) Function: The scanner sends back a Data-Block that consists of properties of the scanner

such as the identification, resolution, and number of data in the maximum

reading area, in the format shown below.

(3) Handshaking

1) ESC I code

2) Data-Block

(4) Contents of Data-Block

< Data > < Description >

STX( 02H ) :Header

?? :Status byte (1 byte)

97 :Number of data (2 bytes)

“B 8” :The command level identification

“R”, 50, :Available resolution description

“R”, 72, “R”, 75

“R”, 80, “R”, 90

“R”, 100, “R”, 120

“R”, 133, “R”, 144

“R”, 150, “R”, 160

“R”, 175, “R”, 180

“R”, 200, “R”, 216

“R”, 240, “R”, 300

“R”, 320, “R”, 360

“R”, 400, “R”, 480

“R”, 600, “R”, 720

“R”, 800, “R”, 900

“R”, 1200, “R”, 1600

“R”, 1800, “R”, 2400

“A”, 20400,28080 :Horizontal and vertical maximum reading area at the

maximum resolution.

Note: The numerical data should be 2 bytes binary, and the lower byte should precedes the higher byte.