NCR 7890, User Manual

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Programming Your 7890 Scanner
Communications Options
5-90 User’s Guide
Communications Options
The Communications Options Programming mode
controls parameters associated with the 7890
Presentation Scanner communications. Options in this
mode were added in July of 1993 and January of 1994. If
your scanner does not respond to any of these options,
they are not in your firmware.
For these options the scanner firmware is programmed
to accepts only one parameter at a time and then
returns to the base programming state. Therefore, each
of the parameters must be programmed separately.
Refer to the Communications Options worksheet in
Appendix A.
Some IBM systems send/receive the IBM tags as hex
data, and others use ASCII. ASCII data format is often
required with the Hand Held Bar Code Reader (option
10-6 under Communications Protocol). Scan the Hex 0
tag to send/receive the tags as hex data. Scan the Hex 1
tag to send/receive them as ASCII data. Sending hex
data is the default.
Some systems want the scanner to hold OCIA tag data
until the terminal clocks it, and some systems prefer to
have the scanner just drop the data after one to two
seconds. If you scan the Hex 2 tag, the NCR 7890
Scanner holds or maintains the OCIA tag data. If you
scan the Hex 3 tag, the scanner drops the data after one
to two seconds. Holding the tag data is the default.
Send IBM Tags in
Hex or ASCII
Maintain or Drop
OCIA Tag Message
Data