B6250/B6500 User’s Guide> 166
<ESC>(s8,16,24,32B<ESC>(s8,16,24,32S
C
ODE
128 C
ONTROL
C
ODES
Code 128 has five non-data special control codes, called FUNCTION
CODES, and 2 control codes to switch from one 128 set (A, B or C)
to another one. The switching control codes are used to force one
128 set. As an example, the string <<123456>> can be printed with
sets A, B and C. Inserting a character with ASCII value = 134 at the
beginning of the string will force the barcode feature to use the set
B of code 128. Note that both Code 128 Autoswitch and EAN 128
analyze the data and optimize the barcode length by switching
automatically between sets A, B and C. EAN128 and UCC-128
already include the FNC1 code as the first character: you should not
send it with the data. Special control codes are inserted by passing
the following special decimal characters in the bar code:
• 128 = SHIFT
• 129 = FNC 1
• 130 = FNC 2
• 131 = FNC 3
• 132 = FNC 4
• 133 = CODE A
• 134 = CODE B
• 135 = CODE C
PCL E
SCAPE
S
EQUENCE
E
XAMPLE
A valid PCL escape sequence to select a barcode is like the following:
<Esc>(s4p102h40v12;250b24670T
P
ARAMETER
M
EANING
24670T (Symbology: code 39)
4p (Readable text below bars, without start/stop chars(*))
102h HRI text in Univers Regular
40v Bars height: 40 points 40/72=0.555 inches 40*2.54/72=1.41
cm
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