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

EN Environment Commands 6-11
PJL Environment Variables
This section lists the PJL environment variables. General PJL
environment variables (those not printer language-specific) are listed
first, followed by printer language-specific variables. For most
variables except the read-only variables, value settings can be
modified using the following commands:
• SET — sets PJL Current Environment settings that remain
active until the next “PJL reset condition” (e.g. JOB, EOJ,
RESET, INITIALIZE commands—see page 6-8).
• RESET — the PJL RESET command defaults the PJL Current
Environment to the User Default Environment (feature settings
set with the DEFAULT command or the control panel keys).
• DEFAULT — modifies the User Default settings (stored in
NVRAM in those printers containing NVRAM).
• INITIALIZE — defaults all environments to the Factory Default
settings.
You can request value settings for printer features using the following
two commands:
• INQUIRE — requests the PJL Current Environment settings.
• DINQUIRE — requests the User Default (control panel)
settings.
(The INQUIRE and DINQUIRE commands are discussed in
Chapter 7.)
Note Whenever possible, use printer language commands to set printer
features. Use PJL commands only when there are no printer
language commands available for a desired feature.
When setting printer features with PJL, use the SET and RESET
commands if you want to affect the current PJL job only. Using the
DEFAULT and INITIALIZE commands affects the current job and
succeeding jobs (these commands should only be used when you
require a command that affects more than just the current job).