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

EN Using PJL 3-7
Status Readback
Commands
(Chapter 7)
INQUIRE Requests the current value
for a specified environment
variable.
DINQUIRE Requests the default value
for a specified environment
variable.
ECHO Returns the <words>
portion of the command to
the host computer.
INFO 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.
USTATUS 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.
USTATUSOFF Turns off all unsolicited
status.
Command Group Command Command Description