HP Color LaserJet 5500 Technical Reference Manual page 34

Command Group
Status Readback Commands
(Chapter 7)
Device Attendance Commands
(Chapter 8)
3-6 Using PJL
Command
INQUIRE
DINQUIRE
ECHO
INFO
USTATUS
USTATUSOFF
RDYMSG
OPMSG
STMSG
Command Description
Requests the current value for a
specified environment variable.
Requests the default value for a
specified environment variable.
Returns the <words> portion
of the command to the host
computer.
Requests a specified category of
printer information, such as printer
model number, printer memory
available, configuration, page count,
status, environment variables, and
unsolicited status variables.
Allows printer to send unsolicited
status messages for device status
changes, end-of-job status, and
pages printed. Status can be sent
at specified time intervals.
Turns off all unsolicited status.
Specifies a message that replaces
the READY message on the
printer control panel. Does not
affect online state.
Displays specified message on
printer control panel and takes
printer offline.
Displays specified message on
printer control panel and takes
printer offline. If status readback
is enabled, returns name of
the key (ON LINE, CONTINUE,
or RESET) that operator presses
to return the printer online.