HP Pcl 5 Manual

							ENLeft Offset Registration Command 4-7
Left Offset Registration Command 
The Left (long-edge) Offset Registration command designates the 
position of the logical page across the width (short side) of the 
physical page. This command can be used to adjust the text position 
on the page to allow additional room for the page binding.
? & l # U
#  =   The number of decipoints (1/720 inch)
Default =0
Range =–32767 to 32767
The value (#) is a signed number valid to 2 decimal places. The units 
are decipoints. Positive values cause the logical page, regardless of 
orientation, to move right along the width of the physical page, except 
on the back side (duplex print) of sheets printed in long-edge binding 
duplex mode, where positive values cause it to move left (refer to 
Figure 4-4 and Figure 4-5).
Negative values cause the logical page, regardless of orientation, 
to move left along the width of the physical page, except on the back 
side of sheets printed in long-edge binding duplex mode, where 
negative values cause it to move right (refer to Figure 4-4 and 
Figure 4-5).
NotesThe +/– value is absolute with respect to the default position of the 
logical page along the width of the physical page. It is not relative to 
the present location.
The registration commands may cause data loss by moving the 
logical page outside the printable area.
This command has the same effect regardless of orientation.
This command can be used in both simplex and duplex modes.  
						

							4-8   PCL Job Control CommandsEN
Top Offset Registration Command 
The Top (short-edge) Offset Registration command designates the 
position of the logical page along the length (long side) of the physical 
page.
? & l # Z 
#  =   The number of decipoints (1/720 inch)
Default =0
Range =–32767 to 32767
The value (#) is a signed number valid to 2 decimal places. The units 
are decipoints. Positive values cause the logical page, regardless of 
orientation, to move down along the length of the physical page, 
except on the backside of sheets printed in short-edge binding duplex 
mode, where positive values cause it to move up (refer to Figure 4-4 
and Figure 4-5).
Negative values cause the logical page, regardless of orientation, 
to move up, along the length of the physical page, except on the 
backside of sheets printed in short-edge binding duplex mode, where 
negative values cause it to move down (refer to Figure 4-4 and 
Figure 4-5).
NotesThe +/– value is absolute with respect to the default position of the 
logical page along the length of the physical page. It is not relative to 
the current location of the logical page.
The registration command may cause data loss by moving the logical 
page outside the printable area.
This command has the same effect regardless of orientation.
This command can be used in both simplex and duplex modes. 
						

							ENTop Offset Registration Command 4-9 Figure 4-4 Short-Edge Binding Mode Offsets
Figure 4-5 Long-Edge Binding Mode Offsets 
						

							4-10   PCL Job Control CommandsEN
Duplex Page Side Selection Command 
The Duplex Page Side Selection command causes a Form Feed and 
designates which side of the sheet to print.
The ability to skip a page while duplexing may be required at certain 
locations in a document. For example, a chapter typically begins on 
the front side of a page.
?&a#G
#  =   0 - Select next side
   1 - Select front side
   2 - Select back side
Default =0
Range =0-2 (All other values ignored)
If this command is received by a printer which does not have duplex 
or if duplexing is not enabled, these commands just eject the current 
page (sheet), positioning the cursor at the default position on the next 
page.
Example
To print on the front side of a page, regardless of the current side, 
send the following:
?&a1G
In this example, if the printer is currently formatting a front side, it will 
stop formatting, eject that page (sheet, skipping the back side), and 
begin printing on the next front page. 
						

							ENJob Separation Command 4-11
Job Separation Command 
Job separation provides a means of identifying one print job from 
others in the printer’s output tray. It usually does this by physically 
offsetting one print job from the next.
The Job Separation command toggles the printer’s separation 
mechanism. This command must be sent between each job to enable 
the separation mechanism. 
? & l 1 T
HP recommends that the Job Separation command be included at the 
end of each job, just before the Printer Reset command. HP also 
recommends that this command be included in the programs even 
though printers with job separation are not currently being used. This 
ensures that if a printer with job separation is eventually added, job 
separation will be performed.
If this command is received by a printer which does not have job 
separation, the command is ignored.
NoteIt is possible to perform job offset in printers which do not have a 
mechanical offset mechanism but have dual paper trays. In dual bin 
printers, job offset can be performed by placing colored paper in the 
second tray and using Paper Source command to select the tray to 
feed a blank sheet of colored paper at the end of a job. This method 
should only be used in special cases where the end user can control 
its use, for example, the program should only be available for a dual 
bin printer which can always contain colored paper in one tray. 
						

							4-12   PCL Job Control CommandsEN
Output Bin Selection Command 
The Output Bin Selection command selects either of the two output 
paper bins (upper or lower [rear]) for paper output.
? & l # G
#  =   1 - Upper Output Bin
   2 - Lower (Rear) Output Bin
Default =Upper Output Bin
Range =1, 2
NoteIf this command is received by a printer which does not contain the 
dual output bin feature, it is ignored. 
						

							ENUnit of Measure Command 4-13
Unit of Measure Command 
The Unit of Measure command establishes the unit of measure for 
PCL Unit cursor movements.
? & u # D
#  =Number of units-per-inch
Default =300
Range =96, 100, 120, 144, 150, 160, 180, 200, 225, 240, 288, 300, 360, 
400, 450, 480, 600, 720, 800, 900, 1200, 1440, 1800, 2400, 3600, 
7200.
The value field defines the number of units-per-inch used in the 
following commands:
zVertical Cursor Position (PCL Units). 
zHorizontal Cursor Position (PCL Units). 
zVertical Rectangle Size (PCL Units). 
zHorizontal Rectangle Size (PCL Units). 
In addition, the current unit of measure setting affects the HMI setting, 
which in turn determines how cursor movement values are rounded. 
This affects the result of the following commands: 
zHorizontal Cursor Position (Columns). 
zHorizontal Tab (HT control code). 
zSpace (SP control code). 
zBackspace (BS control code). 
zBitmap Character Delta X (“Delta X (SI),” Chapter 11). 
For example, if the unit of measure is set to 96 (one PCL Unit = 1/96 
inch), then the HMI is rounded to the nearest 1/96 inch. If the unit of 
measure is set to 300 (one PCL Unit = 1/300 inch), the HMI is 
rounded to the nearest 1/300 inch. 
NoteHMI is set either as a result of font selection or through the use of 
the HMI command. The rounding behavior just described only applies 
when the HMI is at its default setting (derived from the currently 
selected font). If the HMI Command was used to override the HMI 
setting, the rounding behavior described above does not apply. 
(See “Horizontal Motion Index (HMI) Command” in Chapter 5 for more 
information.)  
						

							4-14   PCL Job Control CommandsEN
The current unit of measure setting affects all PCL Unit moves, 
horizontal and vertical rectangle size, bitmap and scalable font 
metrics (how the cursor moves after printing a character). The Unit of 
Measure command does not affect the interpretation of binary raster 
data (bitmap fonts, raster graphics or patterns).
Once the units of measure is changed, it stays in effect until another 
is selected or the printer is reset. A control panel or ? E reset returns 
the current unit of measure setting back to the device default setting 
(300).
The units value is part of the modified print environment. As such, it is 
saved and restored whenever a macro is called or an overlay invoked, 
and defaulted when establishing the overlay environment in 
preparation for an overlay.
NoteValues out of range are mapped to the supported value with the 
minimum relative error. For example, a unit selection of 4801 would 
be mapped to 7200, since the relative error (0.3332) is less than the 
relative error when mapped to 3600 (0.3336):
{|4801-7200| over 7200}=0.3332 < {| 4801-3600|over 3600}=0.3336 
Figure 4-6 compares a 4-unit vertical and horizontal cursor move with 
a unit of measure setting of 100 versus 200 units-per-inch. Note that 
the cursor move distance is halved when the Units per inch is 
doubled.
14801 7200–
7200 -----------------------------------0.33324801 3600–
3600 --------------------------------
0.3336 = < = 
						

							ENUnit of Measure Command 4-15 Figure 4-6 Cursor Moves at Different Unit of Measure Settings 
The printer’s physical dot size has no direct bearing on the size of 
PCL Units used in cursor movements. In addition, PCL Units are not 
affected by the current control panel or PJL resolution setting.
NoteIf no other unit of measure value has been specified, then the default 
is one Unit equals 1/300 inch. In this case, a cursor movement of 
450 Units moves the cursor 1.5 inches, whether printed at 300 or 
600 dpi print resolution. 
						

							4-16   PCL Job Control CommandsEN