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

EN Status Readback Commands 7-25
VARIABLES Category
The INFO VARIABLES command returns a list of the environment
and printer language-dependent variables. Use this command to find
a list of the variables, the current setting for each, and the possible
values.
The set of printer language-specific variables returned by the printer
depends on the current environment and the printer languages
installed. Each add-on printer language has its own specific variables.
Printer language-specific variables are always indicated by
LPARM:personality in the response. Port-specific variables (HP
LaserJet 4PJ only) are always indicated by IPARM:port in the
response.
One portion of the returned information is a list of font sources (see
the following example). This list varies depending on which font
sources, such as ROM SIMMs and cartridges, are installed. Only
those font sources which are installed and contain valid fonts appear
on the list. For example, the S option appears only if one or more
permanent soft fonts currently exist.
The FONTNUMBER range lists the range of fonts for the current font
source only. The lower limit is 0 if the current font source contains a
default-marked font; otherwise the lower limit is 1. The upper range
limit varies depending on how many fonts are in the current font
source.
Note For information about any of the environment variables listed by the
INFO VARIABLES command, see the “PJL Environment Variables”
section in Chapter 6.
Example: Using the INFO VARIABLES Command
This example uses the INFO VARIABLES command to obtain a list of
the environment variables. The returned information lists the
environment variables, the current setting, and the value or range of
values for each. For example, the RESOLUTION section indicates the
current setting is 600, and that there are two possible choices: 300
and 600.