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Positions of special characters
When a code consisting only of special characters (FNC, CODEA, CODEB, CODEC, and SHIFT
characters) or a code containing FNC3 has been read, the read data is not stored into the barcode
buffer. When beeper sounding is enabled, the beeper sounds.
Handling of FNC characters
(1) FNC1
The FNC1 character located 1 or 2 places after the start character will not be stored into the barcode
buffer. An FNC1 character located elsewhere will be converted into a GS character (1Dh) and stored
into the barcode buffer.
A code in which an FNC character immediately follows the start character is EAN-128, in which case
the code mark is "W" instead of "K."
(2) FNC2
For a barcode containing an FNC2 character, the data will not be temporarily stored. Instead, the data
code excluding the FNC2 character will be stored into the barcode buffer.
(3) FNC3
If a barcode contains an FNC3 character, the read data will be regarded as invalid and will not be
stored into the barcode buffer. When the indicator LED and the vibrator are enabled by the
BHT_EnableBar function, the indicator LED and the vibrator will be turned ON.
(4) FNC4
The FNC4 character converts data encoded by code set A or B into the extended ASCII format (normal
ASCII + 128). One FNC4 character converts one data character immediately following it into the
extended ASCII format.
A pair of contiguous FNC4 characters converts into the extended ASCII format all the data characters
following it before another pair of contiguous FNC4 characters or a stop character. An exception is
when a stand-alone FNC4 character exists in this string of characters, in which case one data
character immediately following it will not be converted.
Also, the GS character created from an FNC1 character will not be converted into the extended ASCII
format.
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