QMS 1800428-001B, Справочное руководство

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Communication
Modes
3-15 Technical Specifications
When your printer is in ESP mode, printing multiple jobs through the
serial and parallel protocols and end job mode is not set, ESP tech-
nology interprets the emulation for only the first job. The print jobs that
follow are interpreted as being the same emulation as the first job. For
example, if there are two print jobs, the first a PCL file with no EOD
command, and the second a PostScript file with a Ctrl-D (a PostScript
end-of-file character)—ESP technology interprets the emulation of
the first job correctly. But since the first print job has no EOD com-
mand, it “runs” into the second job, and even though the second job is
PostScript, it prints in PCL.
Using the EOD Commands
Since the serial and parallel protocols may not be able to detect an
EOD automatically, due to a lack of an EOD command in some printer
languages, you can insert an EOD command at the end of your file to
tell the printer where your print job ends. QMS Crown printers recog-
nize two end-of-document commands: QMS EOD and HP EOD.
These commands are functionally the same. They enable data
stream sensing for the EOD command, allowing your host computer
to control print job separation. The QMS EOD and the HP EOD
commands perform an end of document for all of the printer
emulations supported on your printer (PostScript, HP-GL, HP PCL,
and Lineprinter).
See your system administrator or applications development depart-
ment to have them identify the standard EOD command for your orga-
nization, or to have them select a standard EOD command.
Setting the End Job Mode for the Serial and
Parallel Protocols
Your printer can be connected through the serial or parallel interface
to a stand-alone PC, to a PC print server, or to some other type of
print queuing system. This section provides a quick guide to the steps
needed to set the end job mode for each environment. The following
sections provide more detailed information for each step.