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

EN Environment Commands 6-13
BITSPERPIXEL For PCL 6 only, this variable controls
the number of bits per pixel used when
printing grayscale or color images. The
valid values are dependent on the
current setting of RESOLUTION. If
RESOLUTION is 300 or 1200, the only
valid BITSPERPIXEL value is 1. If
RESOLUTION is 600, the only valid
BITSPERPIXEL values are 1 and 2. For
FastRes 1200 printing, first set the
RESOLUTION to 600 and then set
BITSPERPIXEL to 2. For ProRes 1200,
first set the RESOLUTION to 1200 and
then set BITSPERPIXEL to 1.
2, 1
CLEARABLE-WARNIN
GS
Returns the configuration for displaying
clearable warnings (non-fatal error
messages cleared by pressing the
Continue key.) If the value is set to JOB,
then clearable warnings generated by a
job are displayed only until the start of
the next job. If the value is ON, then
clearable warnings are displayed until
the user presses the Continue key.
JOB, ON
COMPRESSRASTER
STORAGE
Specifies whether or not raster data is
to be compressed when the printer runs
out of memory. When set ON, the
throughput may be slowed down,
though more complex images can be
processed. The default is ON.
ON, OFF
CONTEXT-SWITCH Enables/disables the use of implicit
personality switching. If a job is sent
without an ENTER LANGUAGE
command, the printer looks for context
clues to determine which personality
takes effect. When the personality is
changed, memory is reconfigured and
all downloaded fonts, PCL macros, and
PostScript dictionaries are lost
(however, no I/O data is lost).
ON, OFF
General PJL Environment Variables (continued)
Variable Description
Sample Value
Range