HP Color LaserJet 5500 Technical Reference Manual page 161

Note
For HP LaserJet 4PJ, 4V, 4MV, 5Si, 5SiMx, 5Si Mopier
printers, if the LANG variable is set to Japanese, messages
are displayed using the JIS X0201-76 character set.
For the LaserJet 4000 printer, if LANG is set to POLISH,
CZECH, or HUNGARIAN, messages are displayed using
the Latin 2 (ISO 8859/2) character set. If LANG is
RUSSIAN, messages are displayed using Cyrillic (ISO
8859/51). For LANG=TURKISH, the display is in Latin 5
(ISO 8859/9).
Comments:
This command is useful for making a programming decision
based on which key the operator presses. For example, the
application can prompt the user to press Reset, and then
wait until the Reset key is pressed.
Some HP LaserJet printers may have a different limit for
the number of display lines and number of display
characters. To request the display limits, use the INFO
CONFIG command. The printer returns DISPLAY
LINES=value and DISPLAY CHARACTER SIZE=value as
part of the response message. For example, HP LaserJet 4
and 4M printers return DISPLAY LINES=1, DISPLAY
CHARACTER SIZE=16, indicating that the displayed
message is limited to 1 line of 16 characters.
Example: Using the
This example prompts the printer to display "LOAD FORM
1040" and goes offline. The printer returns the name of the
STMSG Command
key that is pressed to resume operation—in this case, the
Continue key.
<ESC>%-12345X@PJL <CR><LF>
@PJL <CR><LF>
@PJL STMSG DISPLAY = "LOAD FORM 1040" <CR><LF>
@PJL <CR><LF>
@PJL ENTER LANGUAGE = PCL <CR><LF>
<ESC>E . . PCL job . .<ESC>E<ESC>%-12345X
Device Attendance Commands 8-7