Unitech MP200, Developer'S Manual

Copyright 2008 Unitech Electronics Co., Ltd. All rights reserved. Unitech is a registered trademark of Unitech Electronics Co., Ltd.

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Copyright 2008 Unitech Electronics Co., Ltd. All rights reserved. Unitech is a registered trademark of Unitech Electronics Co., Ltd.

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Command String

Printer Output

Esc-‘Z’-‘1’-0x07- 0x0a-‘CODE-39’

Prints  CODE -39, 1mm high

 Table 4.1 – CODE 39 Examples

4.2 Code 128 specifications  

Description:                                       Each symbol starts with Leading Quiet Zone, 

                                                          followed with Start Symbol, Data Symbols,       

                                                          ending with Stop Symbol and Trailing Quiet Zone.

Character set: 

  Support for full 256 ASCII set among three 

subsets.

Elements per symbol: 

6 (3 bars, 3 spaces)

Character density: 

9.1 CPI 

Bar width: 

  0.25mm

Characters per line: 

13 alphanumeric characters, or 26 numeric only 

(maximum) - automatically centered.

Code 128 Start character:

<start character> = {0x87, 0x88, 0x89} determines the character set to be printed

Start Character

Characters  Sent to 

Printer

Characters Read by Bar 

Code Reader

IF   <start character> is  

0x87  CODE A

0x020  through  0x03F  

ASCII (#32 - #63)

0x020  through  0x03F  

ASCII (#32 - #63)

0x040  through  0x07F  

ASCII (#64 - #127)

0x00   through  0x07F  

ASCII (#0 - #31)

IF   <start character> is 

0x88  CODE B

0x020 through 0x07F 

ASCII (#32 - #127)         

0x020 through 0x07F 

ASCII (#32 - #127)

IF   <start character> is 

0x89  CODE C

(Each number must be 

paired with another)

PAIRS 0x030 through 

0x039 ASCII (#48 - #57)

PAIRS 0x030 through 

0x039 ASCII

 (#48 - #57)

Table 4.2 – Code 128 Start Character

Code 128 Data Bytes:

<DATA>

The data bytes are defined by which character set is defined.  The printer accepts all 

characters 0x20h - 0x7Fh with the translations defined above.

Also, characters 0x080 - 0x86 may be used as code 128 control characters:

HEX

DEC

CODE A

CODE B

CODE C

0x080

128

FNC 3

FNC 3

0x081

129

FNC 2

FNC 2

0x082

130

SHIFT

SHIFT

0x083

131

change to C

change to C

0x084

132

change to B

FNC 4

change to B

0x085

133

FNC 4

change to A

change to A

0x086

134

FNC 1

FNC 1

FNC 1

Table 4.3 – Code 128 Data Bytes

FNC 1:  reserved CODE 128 character (used for UCC/EAN128)

FNC 2:  message append (not supported by all bar code readers)

FNC 3:  Initialize bar code reader

FNC 4:  extend characters (bar code reader reads cha 128)

     For example:  ‘a’ is changed from #97 to #97+128 = #225

Notice: It is possible to switch code sets in the middle of the bar code.  This is useful 

with heavily numeric alphanumeric bar codes (see example below).

 Code 128 EXAMPLES:

Print alphanumeric bar code “A2a”, 12.5mm high, with human readable text:

n = 3 printed char 1 start character = 4

L = 12.5mm / 0.125mm = #100

start character = START B (full ASCII alpha numeric) = #136

#27 

#90

#50

#04

#100

#136

#65

#50

#97

0x1B

0x5A

0x32

0x04

0x64

0x88

0x41

0x32

0x60

ESC

‘Z’

‘2’

0x04

‘d’

0x88

‘A’

‘2’

‘a’

Print all-numeric bar code “1234”, 5mm high, without human readable text:

n1 = 4 printed char 1 start character = 5

L = 5mm / 0.125mm = #40

start character = START C (numeric pairs) = #137