Configurable Features; Indicators For The Operator; Bar Code Decoding; Minimum Scans Per Read - IBM 4685-L0D Setup, Operation, And Service Manual

The RS-485 model and the USB model of the 4685-L0D scanner are configured by
sending commands from the POS terminal. The RS-232 model is configured by
reading programming bar codes. For information about the support programs, see
"Operating system" on page 1-6.
Note: A POS terminal that has a USB or RS-485 interface recognizes the
4685-L0D scanner as a handheld scanner.

Configurable features

This section describes the features of the scanner and the settings available for
each feature. As the scanner is shipped, each feature has a default setting, here
shown underlined and in boldface type.

Indicators for the operator

Bar code decoding

Minimum scans per read

Scans per read refers to the number of laser sweeps that the scanner is to make
over the bar code to achieve a correct reading. One scan is generally sufficient,
and yields the highest throughput. The choices are as follows:
Because UPC-E codes are short, the default is set at two scans to improve the
probability of correct readings.
3-2
IBM 4685-L0D Scanner: Setup, Operation, and Service Guide
Important
Before you can verify the scanner and complete the test, the POS terminal must
be correctly configured for the scanner. If it is not, configure is at this stage.
Tone (beep) heard after a correct reading of a bar code: Enabled, Disabled
Tone volume: Low, Medium, High
Double-read timeout: 400, 500, 600, 800, 1000 ms
The double-read timeout is the interval between readings of the same label.
The default time, 600 ms, is a good compromise between prevention of double
reading and the need to scan rapidly for the sake of throughput (the number of
items scanned in a minute). If you do not need high throughput, select a
longer double-read time.
Reading UPC/EAN, Code 39, Code 128, Interleaved 2 of 5: Enabled, Disabled
Reading Add-on label (P2 supplemental, P5 supplemental) and EAN/JAN
2-label: Enabled, Disabled
UPC-A: One, Two, Three
UPC-E: One, Two, Three
EAN-13: One, Two, Three
EAN-8: One, Two, Three
UPC In-Store Code: One, Two, Three
Code 39, Code 128, and Interleaved 2 of 5: One, Two, Three