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Frequently Asked Questions about the
HPI-3000 Protocol Converter
What kind of
printers does the HPI-3000 work with?
What's different about using a
laser or inkjet printer instead of a matrix printer?
So what does the
"form-feed suppression" option do?
How much setup is
involved in using the HPI-3000?
Can I use the same cable that I've been using
with my Honeywell matrix printer?
What kind of printers does
the HPI-3000 work with?
The HPI-3000 works with any Hewlett Packard compatible printer
conforming to HP’s PCL3 printer control language, unless the printer was
designed exclusively for the Microsoft’s Windows operating system (i.e.
the DeskJet 820Cse and 820Cxi). The HPI-3000 also works with any matrix
printer supporting Epson MX-80 emulation.
Some printers that conform to PCL3 are slower than the
original Honeywell matrix printer, and may not be suitable as replacements
for the matrix printer. The older HP DeskJet 500, for example, produces a
high quality screen print and is fine for short reports, but the Universal
Station gives up on long reports and times out after about 16 pages. Any
member of the HP LaserJet series, most of the current DeskJet series, many
Lexmark printers work well with the HPI-3000. The HPI-3000 produces a
screen print on a HP LaserJet 4 in 45 seconds.
What's
different about using a laser or inkjet printer instead of a matrix
printer?
Laser printers and DeskJet printers are sheet-fed page printers, where
the original Honeywell matrix printer uses continuous forms. These page
printers will respond to a form-feed command by ejecting a page, where the
matrix printer would scroll to the top of the next page. This results in
an occasional blank page being ejected from the page printers. Since the
HPI-3000 is a hardware device external to the Universal Station and makes
no changes to the US operating software, it can only pass along commands
from the Universal Station that were intended for the matrix printer.
Similarly, if the last page of a report prints half of a
page and the Universal Station doesn't add a form feed, the last half page
will remain in the printer until some event occurs that either fills the
page or generates a form feed. On these printers, a status light on the
printer console will indicate that a partial page is waiting, which may be
retrieved by simply pushing the form feed button on the printer console.
Note that you won't be able to read a single line sent
to a page printer until the entire page is full (or until you manually
eject the page). For applications where it is important to read the output
as it occurs (such as alarm printers), an Epson-compatible matrix printer
may be preferable.
So what does
the "form-feed suppression" option do?
There is one circumstance where it is safe to suppress the form
feed and prevent ejecting a blank page from a laser or inkjet printer. The
form-feed suppression option deletes the form feed between two successive
screen prints (since the previous print always clears the buffer).
How much setup is involved in
using the HPI-3000?
If you tell us what printer you intend to use it with, we'll
configure the jumpers for you prior to shipment. Otherwise, there are
three jumpers inside the box (accessible by removing 2 screws), which are
positioned to select between laser and matrix printers, to select between
wide and narrow carriage matrix printers, and to activate options such as
form-feed suppression and landscape text printing. Other than that, you
just plug in the cable to the Universal Station and printer, plug in the
power module, and you're ready to print.
Can I use the same cable that I've
been using with my Honeywell matrix printer?
No, the HPI-3000 requires its own cable to go between the
Universal Station's I/O paddle board and the HPI-3000. For stations with a
25-pin printer connector on the paddle board, this is a 25-conductor
straight-through cable, included with the HPI-3000. The use of this cable
instead of the original Honeywell cable was a design decision, made to
allow the implementation of enhanced printer status reporting via the
HPI-3000 (with a laser printer, conditions of no paper, off-line, and
power off are all reported on the Universal Station peripheral status
display).
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