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Page 4-11PROGRAMMABLE FUNCTION STRINGS
Job Boundary PFSs
A number of the ALLY PLUS PFSs are used exclusively for providing job
boundaries. Job boundaries allow the printer operation to be modified by
the data stream transparently to the user. This feature is useful for printers
that have job offset or multimode capabilities. Job boundaries also can be
used to change font assignments or to reset the printer.
Note: To use job boundaries, configuration Option #57 must be enabled.
Job offsetting is a feature found on the Xerox 4235, HP LaserJet IIISi and
other printers. The feature allows jobs to be separated by physically shifting
the paper to the left or to the right in the output tray. When a host job is
begun (or finished), the ALLY PLUS may be programmed to send the job
offset escape sequence first (or last).
Multimode printers are those that support modes other than their native
mode. The HP LaserJet IIISi, for example, supports Postscript as well as
PCL5. The job boundary PFSs provided by the ALLY PLUS could be
programmed to change modes depending upon the data source (i.e., LU1,
LU3, alternate host).
The following is a list of the job boundary PFSs and a description of when
they are triggered by the data stream:
PFS Description
%12 Switch to Coax Host
%13 Coax Host Finished
%18 Switch to Local Copy
%19 Local Copy Finished
%27 LU1 Bind
%28 LU1 Unbind
%29 LU3 Bind
%30 LU3 Unbind
%52 Alternate LU1 Begin Bracket
%53 Alternate LU1 End Bracket
%54 LU3 Begin Bracket
%55 LU3 End Bracket
Individual jobs are surrounded by the Bracket PFSs (%52-%55). For
example, in an LU1 job, PFS %52 is sent to the printer, then the data, then
PFS %53. This is true only if the PFS actually contains data; by default,
these PFSs are empty. The user must program these PFSs to suit the system
environment as required.