HP PCL/PJL reference - Printer Job Language Technical Reference Manual

EN Programming Tips for Using PJL 11-7
Printer Utility Examples
The following three examples demonstrate the kind of PJL jobs used
by Printer Utilities:
Jobs that request information and perform printer setup
Jobs that request information, set features, and print
existing files
Jobs that monitor printing status
Jobs that Request Information and Perform
Print Setup
The following example demonstrates a job setup utility that first asks
for printer information, then sets default features to a desired state.
This application functions like a remote control panel. This type of
utility enables users to select PJL features before printing from
another application that cannot select PJL features. In this example,
the DEFAULT command is used instead of the SET command, so that
changes apply to all future print jobs.
Note Since this application uses the DEFAULT command, it changes the
User Default Environment and control panel settings. In multi-user
situations, it should be used only by printer administrators to avoid
unexpected results by other users.
(Reading Status Information)
<ESC>%-12345X@PJL <CR><LF>
@PJL COMMENT Requesting features <CR><LF>
@PJL ECHO 15:18:25.3 07-25-92 <CR><LF>
[. . application discards any printer status readback
information received before the ECHO response . .]
@PJL DINQUIRE RET <CR><LF>
@PJL DINQUIRE RESOLUTION <CR><LF>
[. . application receives status readback from the
DINQUIRE commands showing that RET = OFF and
RESOLUTION = 300. . . .]
<ESC>%-12345X