Epson 5000 - Manual (Page 92)

4. Next, run either an application program or a program you
have written in any programming language. Your printer
prints all the codes it receives, as shown below.
5. To turn off data dump mode,press the PAUSE button to stop
printing and then turn the printer off.
Look at the data dump shown in step 4. On the left side of the
printout, all the codes preprinted in hexadecimal formation
the right side of the printout,the same codes appear as
printable characters or, if they are nonprintable codes-such as
control codes—they appear as dots.
By looking at either the characters printed in the text field or
the hex codes, you can see exactly what codes are being sent to
the printer.
Using the Printer 3-27