Installation and Configuration
PJL Software Commands
PJL Software Commands
Many of the control panel functions explained in this chapter can
also be accessed through PJL software commands sent from the
host computer. For the LaserJet 4ML printer, functions such as
entering Service Mode, are accessible
only through PJL
commands. (Note that Service Mode is available only on the
LaserJet 4ML, 4P and 4MP, and
not on the LaserJet 4L.)
The following example shows how to use PJL commands to enter
Service Mode and perform various Service Mode configuration
tasks.
Note
Text is CASE-sensitive in PJL; enter exactly as
shown. The Ec symbol stands for the ASCII
escape character (ESC or /027). When the PJL
code is entered, print the data file (or use the
DOS
COPY command to copy it to the printer).
Table 3-3
Example: PJL Service Mode Commands
PJL Command
‘cYo-l 2345X@PJL
@PJL SET SERVICEMODE=HPBOISEIE
@PJL SET PAGES=O
@PJL SET CRPAPER=LETTER
@PJL SET SKIPDEMO=FALSE
@PJL SET DIAGNOSTICS=OFF
@PJL SET SERVICEMODE=EXIT
@PJL DEFAULT PAPER. LETTER
@PJL RESET
‘cYo-l 2345X
Ecz
ECE
Explanation
Start PJL job.
Enter Service Mode
Set page count [= XXXXX]
Sets cold reset page size [= Letter/A4]
Skips demo/PCL type page [= true/false]
Sets diagnostics [= OFF/ON] (for ISV use)
Exits Service Mode
Selects user paper size default
Performs PJL reset
Exits PJL mode
Prints Self-Test page
Resets the printer.
3-29
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