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

EN Product-Specific Feature Support A-47
Resource Saving
Resource saving is a feature that allows you to prevent loss of
permanent resources (such as fonts, macros, and PostScript
dictionaries) when the printer language, page protection, or resolution
status changes. You can use either PJL or the control panel to
configure resource saving on HP LaserJet 4 Plus, 4M Plus, 4V, and
4MV printers. For
HP LaserJet 4Si/4SiMx and 5Si/5SiMx printers, resource saving is
only configurable from the control panel.
Printer-Specific Job Boundaries
The printers listed above handle the following conditions as PJL job
boundaries. When any of these conditions occur, the User Default
Environment values are loaded into the PJL Current Environment,
which then are loaded into the Modified Print Environment.
• Control panel reset
• Printer language-specific exit command, such as ^D for
PostScript. (Printer language-specific exit commands are not
job boundaries when within a PJL JOB/EOJ command pair.)
• Data stream idle timeout (this occurs when a PJL job is in
progress and there is no data received over the I/O for a
specified length of time). To avoid a timeout, use the PJL JOB
or ENTER commands, since using the JOB or ENTER
commands increases the time the printer waits for I/O data.
This increase is because the printer is processing a job with
clearly indicated start-of-job and end-of-job data stream
commands. See the following “Timeouts” section.
Printers that support resource saving:
HP LaserJet 4 Plus, 4M Plus, 4V, 4MV, 4Si, 4SiMx, 4000 series, 5,
5M, 5P, 5MP, 6P, 6MP, 5Si, 5SiMx, 5Si Mopier, 2100 series, 5000
series, 8000 series, 8100 series
Printers that support PJL job boundaries:
HP LaserJet 4, 4M, 4 Plus, 4M Plus, 4V, 4MV, 4Si,
4SiMx, 4ML, 4P, 4MP, 4PJ, 4LJ Pro, 4LC, 4000 series,
5, 5M, 5P, 5MP, 6P, 6MP, 5Si, 5SiMx, 5Si Mopier,
HP Color LaserJet, HP Color LaserJet 5, 5M, 4500 series,
8500 series, LaserJet 2100 series, 5000 series, 8000 series,
8100 series