Chapter 11 Data Formats of Barcode Types

Code 128

Syntax

 

Figures/Characters (n)

Start Code

Stop Code

 

 

 

 

 

 

 

 

ASCII

 

 

 

 

Table 45 on page 253.

 

 

hex.

None

None

 

 

 

dec.

 

 

 

 

 

 

 

Data Structure

ASCII

DC4

n ... n

DC4

hex.

14

n ... n

14

dec.

20

n ... n

20

Description

While many barcode styles are limited to numbers, Code 128 can encode numbers, letters, and other symbols commonly found on keyboards, such as @, # and %. The Code 128 barcode is similar to three barcodes in one. The three barcode styles are called Code A, Code B, and Code C. Each barcode style is designed to encode certain types of data in the most compact way.

Code A encodes uppercase alpha, numeric and control codes.

Code B encodes upper and lower case alpha and numeric codes.

Code C encodes digits in pairs.

A single Code 128 barcode may consist of all three Code 128 barcode styles A, B and C. The printer chooses the styles which result in the most compact Code 128 barcode for the data to be encoded. Do not be concerned about choosing the correct barcode styles as this is done automatically.

The ">" (greater than) symbol is a special character prefix. If a character with decimal value less then 32 needs to be encoded (i.e., a control character), then send a ">" followed by the character that is decimal 64 higher then the control code character.

NOTE: Control characters conflict with DC4, SUB. These characters are encoded by using the ">" sign following a number that is 64 dec. higher than the control character.

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Image 252
Tally Genicom 6600 manual Hex None Dec