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

EN Status Readback Commands 7-45
Additional page status messages are sent after each succeeding
page lands in the output tray. After the remaining 75 pages of the job
are completely printed the host receives unsolicited page and job
status as follows:
The unsolicited page status indicates that the 100th page printed (25
processed in non-printing mode and 75 printed pages). The job status
indicates that the EOJ command was received and that 75 pages
were printed in the recovery job.
@PJL USTATUS PAGE<CR><LF>
100<CR><LF>
<FF>
@PJL USTATUS JOB<CR><LF>
END<CR><LF>
NAME="End of Recovery"<CR><LF>
PAGES=75<CR><LF>
<FF>