Number of Characters Start Setup End Setup
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Number of Characters Settings:
If you are going to read bar codes of a known length, it is recommended to set the scanner for a fixed
number of characters. The scanner uses this to verify that labels read are of the correct length and
reject labels that do not have the specified length. The advantage of setting a fixed length is that it
provides protection against short scans of labels, such as Interleaved 2of 5, which do not provide
sufficient security against partial scans. The length check is done on the label data and is not affected
by options such as (not) transmit start/stop character or check digit. Setting the number or characters
does not affect fixed length codes, such as EAN-13. It is also possible to set the minimum and
maximum number of characters allowed. The character length settings can be global (applying to all
enabled codes) or individual (applying only to selected code types).
Character Length Settings:
Global Setting
for Fixed Length
fixed length OFF for all variable length codes default
I1
fixed length ON for all enabled variable length codes
I2
Individual Setting
for Length
fixed length ON for selected variable length code(s) IL
set minimum length for selected variable length code(s) IM
set maximum length for selected variable length codes IN
Fixed Length Example Programming Sequence:
1) Scan “Start Setup”
2) Scan “Fixed Length ON” (global or individual)
3) Scan a bar code of the desired length
4) Scan another bar code of a second desired length (optional)
5) Scan “End Setup”
If you scan “global” fixed length then all enabled codes will be affected. If you scan
“individual” fixed length then only the symbology scanned in step 3 and/or 4 is affected.
Note: The maximum number of characters that can be set is 8000.
A-35