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Handling of special characters
If the BHT reads a barcode made up of special characters only (such as FNC, CODE-A, CODE-B,
CODE-C and SHIFT characters), it will not transfer the data to the barcode buffer. If the beeper is
enabled, only the beeper sounds.
• FNC1
FNC1 characters placed within two character positions after the start character are not transferred to
the barcode buffer. FNC1 characters in any other positions are converted to GS characters (1Dh) and
then transferred to the barcode buffer.
If an FNC1 character immediately follows the start character, the barcode will be recognized as
EAN-128 and marked with W instead of K.
• FNC2
If the BHT reads a barcode containing any FNC2 characters, the data is transferred directly to the
barcode buffer with the FNC2 character(s) discarded, without being temporarily buffered.
• FNC3
If the BHT reads a barcode containing any FNC3 character(s), it will regard the data as invalid, and no
data transfer will take place. If enabled by the RdMode property, the indicator LED will light up and the
beeper (vibrator) will sound (vibrate).
• FNC4
The FNC4 character converts data in code set A or B into extended ASCII (basic ASCII code value +
128).
A standalone (single) FNC4 character converts only the subsequent data character into extended
ASCII.
A pair of continuous FNC4 characters converts all subsequent data characters preceding another pair
of continuous FNC4 characters or the stop character into extended ASCII. If, however, a standalone
(single) FNC4 character is inserted in between, one data character immediately after this standalone
FNC4 character is left as it is (not converted).
An FNC4 character does not convert any of GS characters converted by an FNC1 character into
extended ASCII.
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