HP Color LaserJet 5500 Technical Reference Manual page 184

Print Data Generator
The following two examples demonstrate how applications
categorized as "Print Data Generators" should use PJL.
Examples
Both examples work well if sent directly to the printer or
through a spooler.
Jobs That Select a Printer Language
This example selects a printer language using the ENTER
command. It is the most common job format for Print Data
Generators.
<ESC>%-12345X@PJL <CR><LF>
@PJL ENTER LANGUAGE = POSTSCRIPT <CR><LF>
%!PS-ADOBE ... PostScript code ... ^D
~<ESC>%-12345X
Jobs That Set Printer Features
This example specifies two feature settings that cannot be
selected using the specified printer language:
<ESC>%-12345X@PJL <CR><LF>
@PJL SET RET = LIGHT <CR><LF>
@PJL SET RESOLUTION = 600 <CR><LF>
@PJL ENTER LANGUAGE = PCL <CR><LF>
<ESC>E ... PCL print data ... <ESC>E
~<ESC>%-12345X@PJL <CR><LF>
@PJL RESET <CR><LF>
<ESC>%-12345X
10-4 Programming Tips