HP Color LaserJet 5500 Technical Reference Manual page 189

@PJL SET RESOLUTION = 600 <CR><LF>
@PJL ENTER LANGUAGE = PCL <CR><LF>
<ESC>E . . . PCL file . . .<ESC>E
~<ESC>%-12345X@PJL <CR><LF>
@PJL COMMENT Reset PJL to restore <CR><LF>
@PJL COMMENT control panel defaults <CR><LF>
@PJL RESET <CR><LF>
<ESC>%-12345X
Jobs That Monitor Printing Status
The following example enables unsolicited printer status
using the USTATUS DEVICE command. After unsolicited
device status is enabled, the printer automatically sends a
status response whenever the printer's status changes.
<ESC>%-12345X@PJL <CR><LF>
@PJL ECHO Acme #17 8-28-92 5:39:02.9 <CR><LF>
@PJL COMMENT Turn on unsolicited device
~status <CR><LF>
@PJL USTATUS DEVICE = ON <CR><LF>
<ESC>%-12345X
Programming Tips 10-9