Pjl Job Requirements - HP Color LaserJet 5500 Technical Reference Manual

PJL Job
Requirements
3-2 Using PJL
PJL has certain job requirements that must be met to work
correctly. Jobs that satisfy the following requirements are
"well-formed" and work well with all PJL printers, both in
single-computer/single-printer environments and network
environments. Here are the requirements:
All PJL jobs must begin and end with a UEL command
(<ESC>%–12345X). This command exits the current
printer language and returns control to PJL.
The UEL command at the beginning of the job must be
immediately followed by the PJL command prefix
(@PJL). The "@PJL" can be followed by an optional
carriage return and a required line feed character, or it
can be the prefix of another PJL command (see the two
following examples). No other characters, including
control characters, are allowed between the UEL
command and the @PJL prefix.
The UEL command at the job end must not be followed
by anything (except the first character of the next job).
Line Termination—a line feed character (<LF>) is
required to terminate all PJL commands (except the
UEL command). A carriage return can precede the
terminating line feed, however the carriage return is
optional and is ignored.
No blank command lines are allowed. The command
@PJL [<CR>]<LF> is provided for situations where a
blank line is needed to add space between command lines.
The following command lines demonstrate two ways to
begin a job while satisfying PJL requirements. Both lines
begin with a UEL command, are immediately followed by
@PJL, and are terminated with a line feed character. All
PJL jobs also must end with a UEL command. The
examples on the following page demonstrate how to begin
and end a PJL job.
<ESC>%–12345X@PJL <CR><LF>
<ESC>%–12345X@PJL COMMENT *Start Job* <CR><LF>