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7-14 Chapter 7: Programming
A scanner or scanner/scale that uses the Datachecker Interface should
be programmed using this format. If the protocol information is lost,
the scanner/scale defaults to RS-232. It then must be reprogrammed to
OCIA NCR Short. Use the Hex 0 tag to enable this protocol.
OCIA NCR Long – Hex 1
OCIA Long (Alternate Codes Long Format) is used on the NCR 7852
Alternate Codes Scanner and the NCR 7890 Presentation Scanner. This
format originally supported only single byte commands from the host
terminal due to scanner limitations. The OCIA NCR Long format
sends ASCII tag data to the host terminal. Since this format supports 8
data bits, it can accommodate the alphanumeric data found in the
Code 128 and Code 39 bar codes, provided the system software
supports those codes. This data format cannot accommodate scale
communications and is not the same as the data format used in Single
Cable OCIA, even though both formats use long format OCIA
hardware. Use the Hex 1 to enable this protocol.
OCIA Non NCR Dual Cable – Hex 2
The Non NCR Dual Cable configuration uses two separate cables for
the scanner and the scale. The scanner data protocol is the same as in
the OCIA Non NCR protocol. The scale data protocol is the same as is
used on OCIA Dual Cable scale communications (OCIA NCR Short).
Use the Hex 2 tag to enable this protocol.
IBM 468x/9x Port 4A (Slot Scanner) – Hex 3 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 4A.
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 3 tag to enable this protocol.