HP LaserJet 5200

UEL
This command (also referred to as the universal exit language command) terminates the current printer
language and returns control to PJL. It performs the following actions:
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Prints all data that was received before this command.
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Performs a reset: <esc>E in PCL, <cntrl>D in PostScript.
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Turns control over to PJL.
This command is also a valid HP-GL/2 terminator.
The UEL command must be immediately followed by the "@PJL" command prefix. Characters or control
codes other than @PJL (such as <CR> or <LF>) enable the default language and process the print job
in that language. All jobs must begin and end with the UEL command. In addition to starting PJL, the
UEL command creates the same effect as the <esc>E command. However, the <esc>E command
should always be included to ensure backward compatibility.
@PJL COMMENT
This command designates the current line as a comment, which is ignored. The command syntax is:
@PJL COMMENT <words>[<CR>] <LF>
@PJL INFO CONFIG
This command solicits a response to describe the installed options and allows the printer to configure
the installed options automatically to meet the program requirements.
@PJL INFO ID
This command identifies the printer type to the host for reference when selecting printer drivers for
automatic installation. The command syntax is:
@PJL INFO ID <CR><LF>
@PJL INFO USTATUS
This command queries the state of unsolicited JOB status. PAGE and TIMED status are not supported.
The command syntax is:
@PJL INFO USTATUS <CR><CF>
@PJL INFO PAGECOUNT
This command returns the number of pages that have been printed by the engine.
@PJL JOB
This command informs the printer of the start of a PJL job and synchronizes the job-status information.
The printer counts print jobs, including nested jobs, incrementing the job counter for the @PJL JOB
command and decrementing it for @PJL EOJ.
The printer accepts the NAME= parameter and returns the name string in the unsolicited JOB start status
message (if the unsolicited job status is enabled). The printer transmits the unsolicited JOB status
message to every I/O channel that has enabled this function. The following is the message format:
ENWW Interface troubleshooting 251