Lukhan LK-B10, Command Manual, Page: 16 / 135

15
B Com mand - Bar Code
Code 128 Bar Code
Function Characters
(continued)
A sin gle FCN4 tog gles be tween stan dard and
extended ASCII mode for only a single fol low-
ing data char acter. This is re ferred to as shift ing
into ex tended ASCII mode or shift ing into stan -
dard ASCII mode.
Both code sets A and B are needed to rep resent
the en tire ex tended ASCII char acter set, just as
both sets are needed to rep resent the stan dard
ASCII char ac ter set.
FCN4 s can be in serted manually, if nec essary
or de sired, by following the syn tax de scribed
above. The printer will, however, in sert them
au to mat i cally if ex tended ASCII char ac ters are
encountered in the DATA. It will do so in the
most ef fi cient man ner pos si ble:
• If up to 4 contiguous ex tended ASCII charac-
ters are en countered, it will shift into extended
ASCII mode by inserting a sin gle FCN4 be -
fore each one;
• If 5 or more con tiguous ex tended ASCII char-
acters are en countered, it will latch into ex -
tended ASCII mode by inserting two FCN4 s
be fore them.
•
While latched into ex tended ASCII mode, it
will ap ply the same rules if stan dard ASCII
char ac ters are en coun tered.
Thus, the pre ferred way to en code ex tended
ASCII characters is to sim ply em bed them in the
DATA and let the printer manage the en coding
task. For best results, the code set should also
not be spec ified (i.e., p4 = 1). FCN4 s should be
manually in serted only in sys tems where ex -
tended ASCII char acters can not be trans mitted
to the printer.
It is il legal to mix au tomatic and manual modes
within the data for a sin gle symbol; i.e., an ex tended
ASCII char acter en countered in the data af ter an will
be con sidered a syntax er ror. Likewise, an FCN4 af -
ter an extended ASCII char acter will also be con sid-
ered a syntax er ror.
980352-001 Rev.D
3-15