Datalogic PowerScan RF, Руководство по программированию

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PowerScan
®
RF Scanner
Standard 2 of 5/IATA Options
The Standard 2 of 5/IATA symbologies have the following program-
mable features:
• Check Digit
•
Label Length Format
• Read Verification
Check Digit Check Digit calculates the Check Digit to verify that the Check Digit
contained in the bar code label is correct. If you enable this feature,
your bar codes must contain a Check Digit.
If the Check Digit is not calculated, the digit will be sent regardless of
settings for transmit or don’t transmit. For example, if you choose to
Transmit Check Digit, but not calculate, the scanner sends the Check
Digit encoded in the bar code without verifying its accuracy.
Label Length
Format
Label length format permits the selection between variable length or
fixed length formats. For best performance it is recommended to use
the Fixed Length settings when your application requires only one or
two label lengths.
Variable Length Format — directs the scanner to read all labels from
the minimum label length to 50. Set Minimum Length as high as your
application allows.
Minimum Label Length
— selects the minimum label length
that the scanner will recognize. The minimum label length for
this symbology must be between 01 and 50
1
.
Fixed length Format — directs the scanner to read only one or two
label lengths.
If you select fixed length format, there are three bar code labels for pro-
gramming your scanner to read either one or two fixed lengths. The
labels are:
Set First Fixed Length — instructs the scanner that the next
two programming labels scanned will define the first fixed
label length. This setting must be between 01 and 50
1
charac-
ters.
1. For this symbology, the scanner will decode up to 50 characters, but the actual length read will
vary depending upon the interface type, and bar code physical size and quality.