Comments about
HP LaserJet
Printers
This section explains some important points that should be
considered when using PJL with HP LaserJet 4, LaserJet 5,
and Color LaserJet printer families, and the HP LaserJet
6P/6MP printers. Support for the features described in this
section varies. HP LaserJet family printers that support a
particular feature are listed at the beginning of each
feature description.
Printer Language
Switching
Printers that perform context switching automatically
switch printer languages when both of the following
conditions are met:
The PERSONALITY variable is set to AUTO.
The print job contains printable data but does not
contain an ENTER command immediately before the
printable data.
Note HP LaserJet 4PJ and 4LJ Pro printers perform implicit
language switching, but not context switching.
HP LaserJet 4V and 4MV printers cannot context-switch
into the ESC/P language—use explicit switching instead.
Under these conditions, the printer samples the incoming
printable data and looks for indications of a particular
printing language. Once it recognizes the printer language,
the printer backs up to the beginning of the sampled print
data and switches to the printer language determined to be
most appropriate. Then the printer begins to parse the data
in the newly selected printer language.
Printers supporting printer language switching:
HP LaserJet 4, 4M, 4 Plus, 4M Plus, 4V, 4MV, 4Si, 4SiMx,
4ML, 4P, 4MP, 4PJ, 4LJ Pro, 4000 series, 5, 5M, 5P, 5MP,
6P, 6MP, 5Si, 5SiMx, 5Si Mopier, HP Color LaserJet,
HP Color LaserJet 5, 5M
Feature Support A-29
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