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Chapter 4: Installation 4-11
Scale Address for IBM
Most IBM systems have software called Integrated Scanner/Scale that
permits a single-cable installation. You can check the terminal
configuration at the controller to be sure this IBM option is activated.
Once chosen, the scale address is 6E (default setting), and no other
action is required other than plugging the NCR 7870 interface cable
into port 17 (468x). This is the preferred and most common
configuration. For the 4682/469x series IBM terminals, the NCR 7870
interface cable plugs into port 9B. This series has no port 17.
Some older 468x systems require a dual-cable system, where one cable
connects to the scanner and the other connects to the scale. The scale
cable usually plugs into port 21 of a "B" or "C" feature card. It is
possible to preserve the existing terminal configuration and still use the
single-cable feature of the NCR 7870. If there are no other ports used
on the "B" or "C" feature card, you can remove the feature card from
the terminal even though it is configured to be installed.
•
If the card was in slot 2A, program the NCR 7870 scale address to
6A and plug the NCR 7870 Interface Cable into port 17.
•
If the card was in slot 2B, program the NCR 7870 scale address to
6B and plug the NCR 7870 Interface Cable into port 17.
•
If other ports beside port 21 are used on the "B" or "C" card and the
other card slot is empty (2A or 2B), you can still use this procedure
but the terminal configuration must be changed to define that there
is a card in the empty slot and that its port 21 is connected to a
scale. Program the scale to the empty slot address (2A = 6A,
2B = 6B). The existing card port 21 must be configured as not used
and must not be removed from the terminal.
•
If both card slots are used on the terminal, the terminal software
must be a version that can be configured to support an integrated
scanner/scale. This may require upgrading the software.