HP 5100tn Printer Job Language - Technical Reference Manual - Page 140

USTATUS Command The USTATUS command is used to enable or disable unsolicited printer status. Unlike the status information solicited by sending the INQUIRE, DINQUIRE, or INFO commands, unsolicited status is sent automatically when the status changes. Use the USTATUS command when you want to know: Device status changes (such as printer open, paper jams, and paper out conditions) Job status changes (when a JOB command is encountered, the job completely prints, or the job is canceled) Page status changes (when each printed page reaches the output tray) Timed status (periodic status report at a specified time interval) Note Unlike solicited status, the USTATUS command does not have an immediate response. Instead, unsolicited status messages are sent only when the printer status changes. Syntax: @PJL USTATUS variable = value [] Status Message Syntax: @PJL USTATUS variable [1 or more lines of printable characters or followed by ] 7-32 Status Readback Commands