HP 5100tn Printer Job Language - Technical Reference Manual - Page 243

Four conditions may cause the printer to reconfigure user memory: When the printer language changes, either implicitly or explicitly by using the ENTER LANGUAGE command (except when resource saving is enabled). When the page protection setting changes, using the SET or DEFAULT commands, or when the printer is reset using the RESET or INITIALIZE commands or by using the control panel. When the resolution is changed using either the SET or DEFAULT commands, or by using the control panel. When changing the I/O buffering or resource saving settings. Reconfiguring printer memory erases all volatile personality-specific resource information, including downloaded fonts, PCL macros, and PostScript dictionaries (however no I/O data is lost). Memory can be reconfigured only when these conditions actually change the page protection, resolution, or printer language status. For example, if the resolution is at 600 dpi and an application sends the @PJL SET RESOLUTION = 600 command, memory is not reconfigured. If resource saving is enabled, memory is reconfigured, but all volatile personality-specific resource information (such as fonts, macros, and PostScript dictionaries) are not lost (see "Resource Saving" below). If resource saving is disabled, these resources are erased. Resource Saving 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 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 Feature Support A-31