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Serial Interface Settings
If you are using an optional serial interface, you may need to change
the communications protocol of the printer or the computer for them to
communicate properly The protocol used by the printer is decided by
one or two groups of DIP switches located on the serial interface board
(not by SelecType settings); the protocol used by the computer can
probably be altered by a software command. It is essential that the
printer and computer use compatible protocols.
If you can, change the settings on the computer rather than the
interface board because the interface is set up at the factory to give
optimum performance in a wide range of conditions. If your dealer has
installed the interface for you, he or she should also be able to adjust
the computer and interface to achieve a good match.
If you do need to change the settings on the interface yourself,
(perhaps in order to
use
a different computer), the tables below will help
you match the computer and interface. The settings given in the table
cover the conventions used by the computer and printer as data is
transferred. There are other DIP switches and jumpers,
but
for most
purposes you only need change the settings described here. The other
settings are described in the manual supplied with the interface.
Note]
The interface board DIP switch settings
override
SelecType settings.
Figure F-i:
Connecting frame ground wire
Choosing and Setting Up Optional Interfaces
F-7