Rockwell Automation Publication 48CR-UM001A-EN-P - November 2019
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Parameter Overview
Chapter 7
Guard Bar Status
Useful when Interleaved 2 of 5 multisymbols are enabled to help prevent false
data output, which typically occurs with highly tilted or skewed symbols.
A guard bar is a heavy bar (at least twice the width of the wide bar) that surrounds
the printed Interleaved 2 of 5 symbol and helps prevent false reads.
Range Mode Status
Useful in applications where Interleaved 2 of 5 symbols of a specific length are
required.
When Range Mode is disabled, the code reader checks the value of the symbol
length against the values set in Symbol Length #1 and Symbol Length #2. If the
symbol length does not match either of the preset values, then it is rejected as
invalid.
When Range Mode is enabled, Symbol Length #1 and Symbol Length #2 are
combined to form a range of valid symbol lengths. Any symbol length that does
not fall into this range is rejected as an invalid symbol. Either of the preset symbol
length values in the Symbol Length #1 and Symbol Length #2 fields can form the
start or end of the range.
Codabar
Codabar is a 16-bit character set (0…9, and the characters $, :, /, ., +, and –) with
start/stop codes and at least two distinctly different bar widths.
Codabar is used in photo-finishing and library applications. Previously, it was
used in medical applications, but not typically in newer medical applications.
IMPORTANT
Whenever Guard Bar is enabled, the presence of guard bars (also called
bearer bars) is required for decoding to take place.
• Default: Disabled
• Options: 0 = Disabled
1 = Enabled
• Default: Enabled
• Options: 0 = Disabled
1 = Enabled