HP PCL/PJL reference - PCL 5 Comparison Guide
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...typeface has been converted to Intellifont format and is not present on this printer is a smaller, low-cost HP LaserJet printer. The HP LaserJet 4L printer PCL command features are different from those of the control panel functions must be controlled programmatically using Hewlett...-Packard's Printer Job Language (refer to print less dots, thus saving toner. The HP LaserJet 4 printer contains both Intellifont and TrueType scaling technologies, but the 4L contains only Intellifont scaling technology. The Line Printer...
...typeface has been converted to Intellifont format and is not present on this printer is a smaller, low-cost HP LaserJet printer. The HP LaserJet 4L printer PCL command features are different from those of the control panel functions must be controlled programmatically using Hewlett...-Packard's Printer Job Language (refer to print less dots, thus saving toner. The HP LaserJet 4 printer contains both Intellifont and TrueType scaling technologies, but the 4L contains only Intellifont scaling technology. The Line Printer...
HP PCL/PJL reference - PCL 5 Comparison Guide
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... when the printer is configurable using PCL. • Resource saving, as explained in the HP LaserJet 4ML printer section in the LaserJet 4Si printer. The HP LaserJet 4M Plus printer is made available for HP LaserJet 4 and 4M printers, respectively. In addition to extra speed, these symbol sets). When ...printers support Logical Operations (ROP3) as in this operation. • EconoMode, a feature supported by HP LaserJet 4L and 4P printers, allows the user to reduce the amount of toner used by removing about 75% of idle time required before the printer goes into powersave mode is ...
... when the printer is configurable using PCL. • Resource saving, as explained in the HP LaserJet 4ML printer section in the LaserJet 4Si printer. The HP LaserJet 4M Plus printer is made available for HP LaserJet 4 and 4M printers, respectively. In addition to extra speed, these symbol sets). When ...printers support Logical Operations (ROP3) as in this operation. • EconoMode, a feature supported by HP LaserJet 4L and 4P printers, allows the user to reduce the amount of toner used by removing about 75% of idle time required before the printer goes into powersave mode is ...
HP PCL/PJL reference - Printer Job Language Technical Reference Addendum
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...status codes are localized. For a complete description of the "DISPLAY=string" is returned: @PJL USTATUS DEVICE CODE=10006 DISPLAY="16 TONER LOW" ONLINE=TRUE Table 15, Informational messages, on page 118 shows that has been selected for a single digit (0 through ... • Foreground paper-loading messages (41xyy) • Jam messages (42xyy) • Optional (external) paper-handling-device messages (43xyy) • HP LaserJet 4000/5000 jam messages (44xyy) • Hardware errors (50xxx) • Personality errors (55xxx) The following message is localized, developers should use the...
...status codes are localized. For a complete description of the "DISPLAY=string" is returned: @PJL USTATUS DEVICE CODE=10006 DISPLAY="16 TONER LOW" ONLINE=TRUE Table 15, Informational messages, on page 118 shows that has been selected for a single digit (0 through ... • Foreground paper-loading messages (41xyy) • Jam messages (42xyy) • Optional (external) paper-handling-device messages (43xyy) • HP LaserJet 4000/5000 jam messages (44xyy) • Hardware errors (50xxx) • Personality errors (55xxx) The following message is localized, developers should use the...
HP PCL/PJL reference - Printer Job Language Technical Reference Addendum
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...a key press 10003 02 WARMING UP (or initializing: Designjet) 10004 05 SELF TEST or INTERNAL TEST 10005 07 RESET, CLEARING MEMORY 10006 16 TONER LOW 10007 CANCELING JOB 10010 * STATUS BUFFER OVERFLOW 10011 18 AUX IO INIT or 18 AUX IO NT RDY or 18 MIO INIT or 18... MIO NOT RDY or HP MIO1 INITIALIZING or HP MIO2 INITIALIZING or HP MIO1 NOT READY or HP MIO2 NOT READY or HP MIO INITIALIZING * When creating software programs for the HP LaserJet 4 and 5 printer families, see "Printer Status Readback" in the "HP LaserJet 4 and 5 Family Comments" section in Appendix A of...
...a key press 10003 02 WARMING UP (or initializing: Designjet) 10004 05 SELF TEST or INTERNAL TEST 10005 07 RESET, CLEARING MEMORY 10006 16 TONER LOW 10007 CANCELING JOB 10010 * STATUS BUFFER OVERFLOW 10011 18 AUX IO INIT or 18 AUX IO NT RDY or 18 MIO INIT or 18... MIO NOT RDY or HP MIO1 INITIALIZING or HP MIO2 INITIALIZING or HP MIO1 NOT READY or HP MIO2 NOT READY or HP MIO INITIALIZING * When creating software programs for the HP LaserJet 4 and 5 printer families, see "Printer Status Readback" in the "HP LaserJet 4 and 5 Family Comments" section in Appendix A of...
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... page request INVALID PIN INTERRUPTING JOB RESUMING JOB 02 WARMING UP (or initializing-Designjet) ORDER BLACK TONER PAGES LEFT ORDER CYAN TONER PAGES LEFT ORDER MAGENTA TONER PAGES LEFT ORDER YELLOW TONER PAGES LEFT ORDER IMAGE DRUM ORDER BLACK DRUM ORDER CYAN DRUM ORDER MAGENTA DRUM ORDER YELLOW DRUM ...ORDER BLACK TONER ORDER CYAN TONER Informational messages (10xxx) 119 Informational messages (continued) Status code Display string or code meaning 10013 10014 10015 10016 10017 10018 10019...
... page request INVALID PIN INTERRUPTING JOB RESUMING JOB 02 WARMING UP (or initializing-Designjet) ORDER BLACK TONER PAGES LEFT ORDER CYAN TONER PAGES LEFT ORDER MAGENTA TONER PAGES LEFT ORDER YELLOW TONER PAGES LEFT ORDER IMAGE DRUM ORDER BLACK DRUM ORDER CYAN DRUM ORDER MAGENTA DRUM ORDER YELLOW DRUM ...ORDER BLACK TONER ORDER CYAN TONER Informational messages (10xxx) 119 Informational messages (continued) Status code Display string or code meaning 10013 10014 10015 10016 10017 10018 10019...
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... YELLOW CARTRIDGE REPLACE TRANSPORT KIT REPLACE CLEANING KIT REPLACE TRANSFER KIT REPLACE FUSER KIT PERFORM PRINTER MAINTENANCE REPLACE SUPPLIES NON-HP SUPPLIES IN USE Genuine HP Supplies Tells the CP that the toner charge that has been developed on the transfer belt needs to select "YES" or "NO" at each door operation for...
... YELLOW CARTRIDGE REPLACE TRANSPORT KIT REPLACE CLEANING KIT REPLACE TRANSFER KIT REPLACE FUSER KIT PERFORM PRINTER MAINTENANCE REPLACE SUPPLIES NON-HP SUPPLIES IN USE Genuine HP Supplies Tells the CP that the toner charge that has been developed on the transfer belt needs to select "YES" or "NO" at each door operation for...
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... 40049 40050 40051 40052 40053 SLEEP MODE (STANDBY) Cartridge error during align cartridges (or reading setup sheet-Designjet) 14 NO EP CART or INSTALL TONER CARTRIDGE or no electrical contact with one or more ink cartridges (Designjet) Using ink cartridges (Designjet) SUPPLY MEMORY ERROR REMOVE PAPER FROM [bin name...-Designjet) 13 PAPER JAM or REMOVE PAPER JAM FE CARTRIDGE Device needs attention PC INSTALL or INSTALL TRAY 2 For ELK BN 16 LOW TONER or TONER LOW or TONER LOW, PRESS GO KEY Cartridge authorization status FI INSERT CART FR REMOVE CART [PJL OPMSG] [PJL STMSG] 50 SERVICE or 50 FUSER...
... 40049 40050 40051 40052 40053 SLEEP MODE (STANDBY) Cartridge error during align cartridges (or reading setup sheet-Designjet) 14 NO EP CART or INSTALL TONER CARTRIDGE or no electrical contact with one or more ink cartridges (Designjet) Using ink cartridges (Designjet) SUPPLY MEMORY ERROR REMOVE PAPER FROM [bin name...-Designjet) 13 PAPER JAM or REMOVE PAPER JAM FE CARTRIDGE Device needs attention PC INSTALL or INSTALL TRAY 2 For ELK BN 16 LOW TONER or TONER LOW or TONER LOW, PRESS GO KEY Cartridge authorization status FI INSERT CART FR REMOVE CART [PJL OPMSG] [PJL STMSG] 50 SERVICE or 50 FUSER...
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... OUT REPLACE DRUM KIT DRUM LIFE LOW REPLACE DRUM KIT TRANSFER KIT OUT REPLACE KIT TRANSFER KIT LOW REPLACE KIT BAD ENV FEEDER CONNECTION WASTE TONER FULL REPLACE DRUM KIT INSTALL DRUM KIT REINSTALL TRANSFER BELT PRESS GO TO PRINT PRESS SELECT TO CHANGE... service error 41.5 UNEXPECTED PAPER TYPE CHECK PAPER IN TRAY Cartridge low Toner cartridge out Drum cartridge out 10.xx.yy SUPPLY MEMORY ERROR ORDER BLACK TONER ORDER CYAN TONER ORDER MAGENTA TONER ORDER YELLOW TONER ORDER IMAGE DRUM ORDER BLACK DRUM ORDER CYAN DRUM ORDER MAGENTA DRUM Operator intervention conditions (40xxx) 137 ENWW Table...
... OUT REPLACE DRUM KIT DRUM LIFE LOW REPLACE DRUM KIT TRANSFER KIT OUT REPLACE KIT TRANSFER KIT LOW REPLACE KIT BAD ENV FEEDER CONNECTION WASTE TONER FULL REPLACE DRUM KIT INSTALL DRUM KIT REINSTALL TRANSFER BELT PRESS GO TO PRINT PRESS SELECT TO CHANGE... service error 41.5 UNEXPECTED PAPER TYPE CHECK PAPER IN TRAY Cartridge low Toner cartridge out Drum cartridge out 10.xx.yy SUPPLY MEMORY ERROR ORDER BLACK TONER ORDER CYAN TONER ORDER MAGENTA TONER ORDER YELLOW TONER ORDER IMAGE DRUM ORDER BLACK DRUM ORDER CYAN DRUM ORDER MAGENTA DRUM Operator intervention conditions (40xxx) 137 ENWW Table...
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...40403 40404 40405 40406 40407 40408 40409 40410 Display string or code meaning ORDER YELLOW DRUM ORDER BLACK TONER ORDER CYAN TONER ORDER MAGENTA TONER ORDER YELLOW TONER ORDER TRANSPORT KIT ORDER CLEANING KIT ORDER TRANFER KIT ORDER FUSER KIT PERFORM PRINTER MAINTENANCE ORDER SUPPLIES ...TRANSPORT KIT REPLACE CLEANING KIT REPLACE TRANFER KIT REPLACE FUSER KIT PERFORM PRINTER MAINTENANCE REPLACE SUPPLIES INSTALL BLACK TONER INSTALL CYAN TONER INSTALL MAGENTA TONER INSTALL YELLOW TONER INSTALL IMAGE DRUM INSTALL BLACK DRUM INSTALL CYAN DRUM INSTALL MAGENTA DRUM INSTALL YELLOW DRUM INSTALL BLACK ...
...40403 40404 40405 40406 40407 40408 40409 40410 Display string or code meaning ORDER YELLOW DRUM ORDER BLACK TONER ORDER CYAN TONER ORDER MAGENTA TONER ORDER YELLOW TONER ORDER TRANSPORT KIT ORDER CLEANING KIT ORDER TRANFER KIT ORDER FUSER KIT PERFORM PRINTER MAINTENANCE ORDER SUPPLIES ...TRANSPORT KIT REPLACE CLEANING KIT REPLACE TRANFER KIT REPLACE FUSER KIT PERFORM PRINTER MAINTENANCE REPLACE SUPPLIES INSTALL BLACK TONER INSTALL CYAN TONER INSTALL MAGENTA TONER INSTALL YELLOW TONER INSTALL IMAGE DRUM INSTALL BLACK DRUM INSTALL CYAN DRUM INSTALL MAGENTA DRUM INSTALL YELLOW DRUM INSTALL BLACK ...
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...KIT INSTALL CLEANING KIT INSTALL TRANFER KIT INSTALL FUSER KIT PERFORM PRINTER MAINTENANCE INSTALL SUPPLIES INSTALL BLACK TONER INSTALL CYAN TONER INSTALL MAGENTA TONER INSTALL YELLOW TONER INSTALL IMAGE DRUM INSTALL BLACK DRUM INSTALL CYAN DRUM INSTALL MAGENTA DRUM INSTALL YELLOW DRUM INSTALL BLACK...KIT INSTALL CLEANING KIT INSTALL TRANFER KIT INSTALL FUSER KIT PERFORM PRINTER MAINTENANCE INSTALL SUPPLIES INSTALL BLACK TONER INSTALL CYAN TONER INSTALL MAGENTA TONER INSTALL YELLOW TONER INSTALL IMAGE DRUM INSTALL BLACK DRUM INSTALL CYAN DRUM INSTALL MAGENTA DRUM INSTALL YELLOW DRUM INSTALL BLACK...
...KIT INSTALL CLEANING KIT INSTALL TRANFER KIT INSTALL FUSER KIT PERFORM PRINTER MAINTENANCE INSTALL SUPPLIES INSTALL BLACK TONER INSTALL CYAN TONER INSTALL MAGENTA TONER INSTALL YELLOW TONER INSTALL IMAGE DRUM INSTALL BLACK DRUM INSTALL CYAN DRUM INSTALL MAGENTA DRUM INSTALL YELLOW DRUM INSTALL BLACK...KIT INSTALL CLEANING KIT INSTALL TRANFER KIT INSTALL FUSER KIT PERFORM PRINTER MAINTENANCE INSTALL SUPPLIES INSTALL BLACK TONER INSTALL CYAN TONER INSTALL MAGENTA TONER INSTALL YELLOW TONER INSTALL IMAGE DRUM INSTALL BLACK DRUM INSTALL CYAN DRUM INSTALL MAGENTA DRUM INSTALL YELLOW DRUM INSTALL BLACK...
HP PCL/PJL reference - Printer Job Language Technical Reference Addendum
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...PRINTER MAINTENANCE INSTALL SUPPLIES NON-HP Cartridge Installed T2 Roller missing Croller out Croller missing REMOVE SEALING TAPE E-label cartridge error ORDER BLACK TONER DAYS LEFT ORDER CYAN TONER DAYS LEFT ORDER MAGENTA TONER DAYS LEFT ORDER YELLOW TONER DAYS LEFT ORDER BLACK ...LEFT ORDER MAGENTA CARTRIDGE DAYS LEFT ORDER YELLOW CARTRIDGE DAYS LEFT ORDER SUPPLIES DAYS LEFT REPLACE BLACK TONER REPLACE CYAN TONER REPLACE MAGENTA TONER REPLACE YELLOW TONER REPLACE BLACK CARTRIDGE REPLACE CYAN CARTRIDGE REPLACE MAGENTA CARTRIDGE REPLACE YELLOW CARTRIDGE REPLACE SUPPLIES 140 Chapter 4...
...PRINTER MAINTENANCE INSTALL SUPPLIES NON-HP Cartridge Installed T2 Roller missing Croller out Croller missing REMOVE SEALING TAPE E-label cartridge error ORDER BLACK TONER DAYS LEFT ORDER CYAN TONER DAYS LEFT ORDER MAGENTA TONER DAYS LEFT ORDER YELLOW TONER DAYS LEFT ORDER BLACK ...LEFT ORDER MAGENTA CARTRIDGE DAYS LEFT ORDER YELLOW CARTRIDGE DAYS LEFT ORDER SUPPLIES DAYS LEFT REPLACE BLACK TONER REPLACE CYAN TONER REPLACE MAGENTA TONER REPLACE YELLOW TONER REPLACE BLACK CARTRIDGE REPLACE CYAN CARTRIDGE REPLACE MAGENTA CARTRIDGE REPLACE YELLOW CARTRIDGE REPLACE SUPPLIES 140 Chapter 4...
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Jam location codes for the HP LaserJet 4000 and 5000 series printers only). Remove toner cartridge to open door 19 Paper jam in the lower ...door of printer) 03 Paper jam underneath the top cover. Table 34. HP LaserJet 4000 and 5000 series jam messages x 0 - 9 Description Number of the jammed sheet. LaserJet 4000 / 5000 series jam messages (44xyy) This category contains unsolicited status error... messages that relate to jams (for HP LaserJet 4000 and 5000 series jam messages yy Jam location 00 Paper jam in unknown location...
Jam location codes for the HP LaserJet 4000 and 5000 series printers only). Remove toner cartridge to open door 19 Paper jam in the lower ...door of printer) 03 Paper jam underneath the top cover. Table 34. HP LaserJet 4000 and 5000 series jam messages x 0 - 9 Description Number of the jammed sheet. LaserJet 4000 / 5000 series jam messages (44xyy) This category contains unsolicited status error... messages that relate to jams (for HP LaserJet 4000 and 5000 series jam messages yy Jam location 00 Paper jam in unknown location...
HP PCL/PJL reference - Printer Job Language Technical Reference Manual
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... the DEFAULT command, and can only be possible to 999 page of the "PJL Job Security" section in many of the LaserJet printers. If OFF, reading and writing are enabled. General PJL Environment Variables (continued) Variable Description Sample Value Range COPIES Number ...of uncollated copies for the ECONOMODE toner-saving feature used in Chapter 5. COURIER Sets the version of the paper. For more information, see the "Control Panel Lock" portion...
... the DEFAULT command, and can only be possible to 999 page of the "PJL Job Security" section in many of the LaserJet printers. If OFF, reading and writing are enabled. General PJL Environment Variables (continued) Variable Description Sample Value Range COPIES Number ...of uncollated copies for the ECONOMODE toner-saving feature used in Chapter 5. COURIER Sets the version of the paper. For more information, see the "Control Panel Lock" portion...
HP PCL/PJL reference - Printer Job Language Technical Reference Manual
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... the loaded roll of waste media between plots. PAPER, SPECIAL, TRANSPARENCY, GLOSSY MIRROR Horizontal reflection of plots. ON, OFF MARGINS Sets the margins for low-toner ON, OFF, STOP, messages. JOBOFFSET Sets the default job offset state. TRAY1, TRAY2, TRAY3 MEDIATYPE Sets the default media type for the ENGLISH, display... ON, OFF LANG Sets the default display language for the current PJL job. If ON or CONTINUE, printer CONTINUE remains online when the LOW TONER message is displayed; ON, OFF 6-18 Environment Commands EN MANUALFEED Manual feed mode.
... the loaded roll of waste media between plots. PAPER, SPECIAL, TRANSPARENCY, GLOSSY MIRROR Horizontal reflection of plots. ON, OFF MARGINS Sets the margins for low-toner ON, OFF, STOP, messages. JOBOFFSET Sets the default job offset state. TRAY1, TRAY2, TRAY3 MEDIATYPE Sets the default media type for the ENGLISH, display... ON, OFF LANG Sets the default display language for the current PJL job. If ON or CONTINUE, printer CONTINUE remains online when the LOW TONER message is displayed; ON, OFF 6-18 Environment Commands EN MANUALFEED Manual feed mode.
HP PCL/PJL reference - Printer Job Language Technical Reference Manual
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... characters as bitmaps to printing them as outlines. OUTTONER Determines how the printer processes a STOP, CONTINUE toner- PORTRAIT, LANDSCAPE OUTBIN Sets the default output bin. (For HP LaserJet 4Si, 4SiMx, 4000 series, 5Si, 5SiMx, 5Si Mopier printers, the UPPER output bin is MAXIMUM...the recommended setting is a face-down, correct-order bin. OPTIONALOUTPUTBIN62 OUTBINPROCESS Supplies external finishing devices with 0 to CONTINUE, a toner-out message will be sacrificed in situations when image banding may occur. for this variable is OPTIMIZED (DesignJet 1000 Series). MANUAL,...
... characters as bitmaps to printing them as outlines. OUTTONER Determines how the printer processes a STOP, CONTINUE toner- PORTRAIT, LANDSCAPE OUTBIN Sets the default output bin. (For HP LaserJet 4Si, 4SiMx, 4000 series, 5Si, 5SiMx, 5Si Mopier printers, the UPPER output bin is MAXIMUM...the recommended setting is a face-down, correct-order bin. OPTIONALOUTPUTBIN62 OUTBINPROCESS Supplies external finishing devices with 0 to CONTINUE, a toner-out message will be sacrificed in situations when image banding may occur. for this variable is OPTIMIZED (DesignJet 1000 Series). MANUAL,...
HP PCL/PJL reference - Printer Job Language Technical Reference Manual
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... changed feature settings to request configuration and status information from the printer. The printer also can send status information indicating the printer door is open, toner is especially useful during application development. For example, the printer can be programmed to send unsolicited status information to send unsolicited status messages, including device...
... changed feature settings to request configuration and status information from the printer. The printer also can send status information indicating the printer door is open, toner is especially useful during application development. For example, the printer can be programmed to send unsolicited status information to send unsolicited status messages, including device...
HP PCL/PJL reference - Printer Job Language Technical Reference Manual
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...Response Syntax: @PJL DINQUIRE [LPARM:personality | ~IPARM:port] variable value • LPARM : personality - Valid values for port for the HP LaserJet 4PJ printer are inquiring. See Appendix A for any environment variable, including read-only variables. If you are SERIAL and PARALLEL. • ... specifies the environment variable about printer language-specific environment variables. For example, the DINQUIRE DENSITY command requests the default toner density setting. This optional parameter is the only printer which you require a more detailed description of a particular variable...
...Response Syntax: @PJL DINQUIRE [LPARM:personality | ~IPARM:port] variable value • LPARM : personality - Valid values for port for the HP LaserJet 4PJ printer are inquiring. See Appendix A for any environment variable, including read-only variables. If you are SERIAL and PARALLEL. • ... specifies the environment variable about printer language-specific environment variables. For example, the DINQUIRE DENSITY command requests the default toner density setting. This optional parameter is the only printer which you require a more detailed description of a particular variable...
HP PCL/PJL reference - Printer Job Language Technical Reference Manual
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See Appendix A for each printer, or send the @PJL INFO VARIABLES command to stay online when the toner is either ON or OFF (or CONTINUE/STOP), indicating whether or not you sent the DINQUIRE LOWTONER command, the returned value is low. ...are listed in Appendix A. Parameters: Parameter personality port variable value Variable Names PCL ESCP POSTSCRIPT (other personalities may be supported) PARALLEL SERIAL Supported on HP LaserJet 4PJ only Valid variables for each variable may not be the same in all PJL printer models. Note The supported variables and range of values...
See Appendix A for each printer, or send the @PJL INFO VARIABLES command to stay online when the toner is either ON or OFF (or CONTINUE/STOP), indicating whether or not you sent the DINQUIRE LOWTONER command, the returned value is low. ...are listed in Appendix A. Parameters: Parameter personality port variable value Variable Names PCL ESCP POSTSCRIPT (other personalities may be supported) PARALLEL SERIAL Supported on HP LaserJet 4PJ only Valid variables for each variable may not be the same in all PJL printer models. Note The supported variables and range of values...
HP PCL/PJL reference - Printer Job Language Technical Reference Manual
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..., 4V, 4MV, 5Si, 5SiMx, and 5Si Mopier printers, if the LANG variable is set . Some HP LaserJet printers may have a different limit for example, toner low), the new ready message does not appear until these outstanding conditions are displayed using Cyrillic (ISO 8859/5). When...Hungarian on page 8-2.) After the job is limited to POLISH, CZECH, or HUNGARIAN, messages are sent by the printing application; For example, HP LaserJet 4 and 4M printers return DISPLAY LINES=1, DISPLAY CHARACTER SIZE=16, indicating that prints a job from another application. For LANG=TURKISH, the ...
..., 4V, 4MV, 5Si, 5SiMx, and 5Si Mopier printers, if the LANG variable is set . Some HP LaserJet printers may have a different limit for example, toner low), the new ready message does not appear until these outstanding conditions are displayed using Cyrillic (ISO 8859/5). When...Hungarian on page 8-2.) After the job is limited to POLISH, CZECH, or HUNGARIAN, messages are sent by the printing application; For example, HP LaserJet 4 and 4M printers return DISPLAY LINES=1, DISPLAY CHARACTER SIZE=16, indicating that prints a job from another application. For LANG=TURKISH, the ...
HP PCL/PJL reference - Printer Job Language Technical Reference Manual
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When the printer changes state, the application takes appropriate action, such as printer open, paper out, or low toner. The USTATUS DEVICE and USTATUS TIMED commands are used to print information, but enable the user to monitor printer status. Applications can inform the application ...
When the printer changes state, the application takes appropriate action, such as printer open, paper out, or low toner. The USTATUS DEVICE and USTATUS TIMED commands are used to print information, but enable the user to monitor printer status. Applications can inform the application ...