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

EN Status Readback Commands 7-11
Note The supported variables and range of values for each variable may
not be the same in all PJL printer models. See Appendix A for a list of
valid variables for each printer, or send the @PJL INFO VARIABLES
command to request this information directly from the printer.
• value — This parameter is the returned value of the requested
variable. For example, if you sent the DINQUIRE LOWTONER
command, the returned value is either ON or OFF (or
CONTINUE/STOP), indicating whether or not you want the
printer to stay online when the toner is low. See Appendix A for
valid variable values.
Parameters:
Parameter Variable Names
personality PCL ESCP
POSTSCRIPT (other personalities may
be supported)
port PARALLEL Supported on HP
LaserJet 4PJ only
SERIAL
variable Valid variables for each printer are listed in
Appendix A.
value Acceptable values for each variable are also
listed in Appendix A.