HP Pcl 5 Manual

							ENModified Print Environment 3-7
Modified Print Environment 
The current printer feature settings constitute the Modified Print 
Environment. Whenever a feature setting is altered using escape 
sequences, the new setting is recorded in the Modified Print 
Environment.
The Modified Print Environment is saved during a macro call or 
overlay and restored upon its completion.
A Modified Print Environment consists of the current settings for the 
items listed in Table 3-1 and Table 3-2, with the exception of the items 
listed in Table 3-3, below.
NoteNot all of the Modified Print Environment features are applicable to 
every printer. To identify variations and default settings for specific 
printers, refer to the PCL 5 Comparison Guide. Table 3-3 Items Not Included in Modified Print Environment
PCL Context   HP-GL/2 Context
Overlay environment  HP-GL/2 overlay environment
Current cursor position  Duplex registration
Cursor position stack  Polygon buffer
Downloaded fonts/macros 
User-defined patterns  
						

							3-8   The Print EnvironmentEN
Resetting the Print Environment 
Resets are used to return the printer to a known environment. 
Depending on the type of reset performed, the printer returns to either 
the User Default Environment or the Factory Default Environment.
Printer Reset 
A Printer Reset restores the User Default Environment and deletes 
temporary fonts, macros, user-defined symbol sets, and patterns. A 
Printer Reset is performed by sending the
 E
CE command, or through 
the printer’s control panel (see the printer User’s Manual). The Printer 
Reset command is described in Chapter 4, PCL Job Control 
Commands.
The 
E
CE command prints any partial pages of data that may have 
been received. The control panel [RESET] discards any formatted 
pages which have not yet been printed.
Both resets ( 
E
CE and the control panel [RESET] ) return the 
HP-GL/2 settings to their default values. E
CE used in HP-GL/2 mode 
returns the printer to PCL mode in addition to resetting the print 
environment. The HP-GL/2 IN (Initialize) command resets HP-GL/2 
settings to their default values without affecting the PCL settings 
(refer to the Initialize command described in Chapter 19, The 
Configuration and Status Group, for additional information).
NotesHewlett-Packard strongly recommends the use of both the E
CE 
command and the E
C%–12345X command (Universal Exit 
Language/Star t of PJL — also referred to as the UEL Command) at 
the beginning and end of each job. (The order of these commands is 
critical. Refer to Table 4-1 for an example of their usage.)
The UEL Command (
E
C%–12345X) has the same effect as the E
CE 
command, and also enters PJL Mode of operation for printers that 
support PJL (refer to “Universal Exit Language Command” in Chapter 
4 for more information). The 
E
CE command should be included to 
ensure backward compatibility (the UEL command is ignored if 
received by a printer that does not support PJL). 
						

							ENResetting the Print Environment 3-9
Cold Reset 
A Cold Reset restores the Factory Default Environment which 
includes resetting the control panel items to their factory default 
settings. A Cold Reset is performed by power cycling the printer while 
holding [ON LINE] until a 08 COLD RESET is displayed.  
						

							3-10   The Print EnvironmentEN 
						

							ENIntroduction  4-1
4
PCL Job Control 
Commands 
Introduction 
A job typically consists of three parts:
zCommands providing job control.
zCommands providing page control.
zPrint data.
Table 4-1 Structure of a Typical Job
?%–12345XUEL Command (exit language)
?EPrinter Reset Command.
PreambleJob Control Commands.
Page 1Page Control Commands.
Data
Page 2Page Control Commands.
1
Data.
1. If a number of consecutive pages within a job have the same format (such as 
margins, VMI, HMI, etc.), the associated page control commands only need to 
be sent once for that group of pages.
 
 
 
 
 
 
Page nPage Control Commands.
Data.
?EPrinter Reset Command.
?%–12345XUEL Command (exit language). 
						

							4-2   PCL Job Control CommandsEN
This chapter describes the commands providing job control. Job 
control commands are usually grouped together and sent at the 
beginning of a job. Page control commands and data are associated 
with each printed page of a job. Job control commands include the 
following:
zPrinter Reset. 
zUniversal End of Language/Start of PJL. 
zNumber of Copies. 
zSimplex/Duplex Print. 
zLeft and Top Offset Registration. 
zDuplex Page Side Selection. 
zJob Separation. 
zOutput Bin Selection. 
zUnit of Measure. 
Printer Reset Command 
Receipt of the Printer Reset command restores the User Default 
Environment, deletes temporary fonts, macros, user-defined symbol 
sets and patterns. It also prints any partial pages of data which may 
have been received.
? E
NotesHewlett-Packard strongly recommends the use of both the ? E 
command and the ?%–12345X command (Universal Exit 
Language/Star t of PJL — also referred to as the UEL Command) at 
the beginning and end of each job. (The order of these commands is 
critical. Refer to Table 4-1 for an example.)
The UEL Command (?%–12345X) has the same effect as the ? E 
command, and also enters PJL Mode of operation for printers that 
support PJL (refer to the next section, “Universal Exit Language 
Command” for more information). The ? E command should be 
included to ensure backward compatibility (the UEL command is 
ignored if received by a printer that does not support PJL). 
						

							ENUniversal Exit Language Command 4-3
Universal Exit Language Command 
The Universal Exit Language (UEL) command causes the PCL 
printer language to shut down and exit. Control is then returned to the 
Printer Job Language (PJL). Both PCL 5 and HP-GL/2 recognize this 
command.
? % – 1 2 3 4 5 X
Default =N/A
Range =–12345
This command performs the following actions: 
zPrints all data received before the Exit Language command. 
zPerforms a printer reset (same effect as ? E). 
zShuts down the PCL 5 printer language processor. 
zTurns control over to PJL.
NotesHewlett-Packard strongly recommends the use of both ? E (printer 
reset) and ?%–12345X (UEL command) at the beginning and end of 
each job. (The order of these commands is critical. Refer to Structure 
of a Typical JobTable 4-1 for an example.)
The UEL Command (?%–12345X) has the same effect as the ? E 
command, and also enters PJL Mode of operation for printers that 
support PJL. The ? E command should be included to ensure 
backward compatibility (the UEL command is ignored if received by a 
printer that does not support PJL). 
						

							4-4   PCL Job Control CommandsEN
Number of Copies Command 
The Number of Copies command designates the number of printed 
copies of each page.
? & l # X
#  =   Number of copies (1 to 32767 maximum)
Default =1 (Configurable from control panel)
Range =1-32767
(Values 32767 execute as 32767 values 1 are ignored.
Maximum number of copies=99 for LaserJet II, IIP, III, IIID, IIIP 
and earlier LaserJet printers.)
This command can be received anywhere within a page and affects 
the current page as well as subsequent pages.
Example
To print 3 copies of a page, send: 
?&l3X
Figure 4-1 Number of Copies
NoteThe HP-GL/2 Replot (RP) command is inactive for PCL 5 printers; 
use the Number of Copies command for multiple HP-GL/2 plots. To 
be effective, the Number of Copies command must be issued from 
PCL prior to closing the page on which the plot is defined. 
						

							ENSimplex/Duplex Print Command 4-5
Simplex/Duplex Print Command 
This command designates either simplex or duplex printing mode for 
duplex printers. Simplex mode prints an image on only one side of a 
sheet (page). Duplex mode prints images on both sides of a sheet.
? & l # S  
#  =   0 - Simplex
   1 - Duplex, Long-Edge Binding
    2 - Duplex, Short-Edge Binding
Default =0
Range =0-2 (Other values ignored) 
Long-Edge bound duplexed pages are bound along the length of the 
physical page (see Figure 4-2). Short-edge bound duplexed pages 
are bound along the width of the physical page (see Figure 4-3).
Selecting long-edge binding usually results in font rotation. This may 
be a concern if available user memory is critical.
NoteIf this command is received by a printer which does not contain the 
duplex feature, it is ignored. Printers which do not contain the duplex 
feature print in simplex mode (front side of sheet) only. 
						

							4-6   PCL Job Control CommandsEN
Figure 4-2 Long-Edge Binding Mode
Figure 4-3 Short-Edge Binding Mode