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

EN Product-Specific Feature Support A-55
Resource Saving
None of the DeskJet 1200C or 1600C printer families support
resource saving.
Printer Specific Job Boundaries
Unlike the LaserJet 4 family of printers, no implicit PJL job boundaries
are recognized. There are no additional conditions which will cause
the User Default Environment values to be loaded into the PJL
Current Environment, or (subsequently) to be loaded into the
Modified Print Environment.
Timeouts
These printers have a timeout capability which is used to recover
when jobs are interrupted by situations such as host failures. The
timeout duration varies depending on the data received by the printer.
The TIMEOUT variable set using PJL establishes the I/O timeout
durations to wait before switching to another pending I/O. If the printer
has not received printable data, it will wait for the TIMEOUT duration
before closing the current job and switching to another pending I/O. If
the printer has received printable data and is waiting for more data,
the printer uses an extended timeout duration, which is equal to five
minutes or ten times the TIMEOUT value, whichever is greatest.
Printers that support printer specific job boundaries:
HP DeskJet 1200C, 1200CM, 1600C, 1600CM
Printers that support printer timeouts:
HP DeskJet 1600C, 1600CM