NCR 7870 manual IBM 468x/9x Port 4B Hhbcr Hex 4 tag, RS-232 Hex 5 tag, Ocia Single Cable Hex 6 tag

Chapter 7: Programming 7-15

IBM 468x/9x Port 4B (HHBCR) – Hex 4 tag

All models of the NCR 7870 support the IBM 468x/9x format and use the same protocol found on IBM terminals. The scanner uses terminal port 17 and the select address is set to 4B. Use this protocol with the hand held bar code reader.

If your unit is a scanner/scale, the IBM address default setting is 6E, but can be programmed to 6A or 6B. The IBM terminal integrated scanner/scale driver normally uses address 6E. However, if the scanner works but the scale does not, try using the other two scale addresses. Use the Hex 4 tag to enable this protocol.

RS-232 – Hex 5 tag

RS-232 is used to connect the scanner or scanner/scale to almost any RS-232 type of communications device. This protocol uses 7-bit ASCII to send tag and scale data to the device. Use the Hex 5 tag to enable this protocol.

OCIA Single Cable – Hex 6 tag

The OCIA Single-Cable scanner/scale format is the format normally used in supermarkets to talk to an NCR 7870 Scanner/Scale. Since this format supports 7-bit data, it can accommodate the alphanumeric data found in the Code 128 and Code 39 bar codes, provided the system software also support those codes. Use the Hex 6 tag to enable this protocol.

OCIA NCR Dual Cable – Hex 7 tag

The OCIA NCR Dual Cable configuration uses two separate cables for the scanner and scale. The data protocol is the same as in OCIA NCR Short. This dual cable communications scheme is used on older NCR terminal systems such as 2557 and 2126 systems. This format can accommodate only 5 data bits per character and supports only UPC/EAN bar code data. Use the Hex 7 tag to enable this protocol.