NCR 7870 manual Scale Address for IBM

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.