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

Glossary-2 EN
After a job boundary is encountered and there is no data available
from the active I/O port, all the I/O ports are enabled and checked for
available data. The first port to receive data is the new active I/O port.
The other ports are temporarily disabled, the print job processed, and
then the automatic I/O switching process repeats.
Configuration
Configuration is the process of changing printer settings. The printer
is configured using the control panel or PJL.
Context-Sensitive Printer Language Selection
Context-sensitive printer language selection is a method of selecting
a printer language by looking at the first portion of a job to discover
clues as to which printer language to use. The syntax differences in
each printer language allow the language to be determined.
Context-sensitive language selection is only operational if the control
panel variable PERSONALITY is set to AUTO and the print job does
not contain a PJL ENTER command before non-PJL data.
Control Code
A control code is a non-printable ASCII character that initiates a
printer function, for example carriage return (<CR>), line feed (<LF>),
and form feed (<FF>).
Default
A value used instead of a programmatically selected value. A factory
default is a value programmed into the printer at the factory; this value
is stored in read-only memory and cannot be changed by a user or
operator. A user default is a default value, stored in non-volatile RAM
(in printers that have NVRAM), that is selectable using the control
panel or the PJL DEFAULT command.
Download
The process of transferring data, including soft fonts, macros, or
raster data from a host computer to the printer.
Environment
See “Print Environment.”