HP 2500 HP PCL/PJL reference - Printer Job Language Technical Reference Manual - Page 148

Note JOB Variable The USTATUS JOB = ON command is used to notify the application every time a JOB command is encountered, when the final page of a job is in the output tray and an EOJ command has been received, and when a job has been canceled (only for those printers that support job cancellation such as the HP LaserJet 4000 series and 5000 series printers). This is useful for spooling applications requiring feedback indicating that a particular job has started or completely printed. If job status is enabled and the printer receives a JOB command, it resets the page count associated with the unsolicited page status and returns a job status message. Resetting the page count associated with unsolicited page status affects only future pages. Pages that are already processed, but not yet printed, are not affected. The PAGES=number of pages information associated with unsolicited EOJ status indicates the number of pages printed on paper. It does not include any page images that were processed in non-printing mode (see the "PAGE Variable" discussion.) When in the duplex mode, each side of a duplex page counts as one page. 7-36 Status Readback Commands EN