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

6-26 Environment Commands EN
Port-Specific Variables (LaserJet 4PJ Only)
The following variable is I/O port-specific in the HP LaserJet 4PJ
printer, and can be set and requested using PJL. This variable must
be set using the IPARM : port option. For the HP LaserJet 4PJ, the
valid values for port are SERIAL and PARALLEL.
Port-Specific Variables
Variables Description
Sample Value
Range
PERSONALITY Personality for implicit switching (implicit
switching refers to switching to the default
personality without explicitly doing so with the
@PJL ENTER command). Note that the
value string (PCL, ESCP, and so on) for each
installed personality is defined by the
personality itself. When the personality is
changed, memory is reconfigured and all
downloaded fonts and PCL macros are lost
(however, no I/O data is lost). Refer to
“Commands that Affect Printer Memory” in
Appendix A.
PCL, ESCP