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Mobile Printing Systems
CPCL Programming Manual
Section 5
Linear Bar
Codes
pg. 5-7
Refer to the full bar code symbology specification for complete information on checksum calculation.
For a short example, take an example bar code with the data “CODE 39” .
Step 1: Assign a value to each character per the Character Numerical Value Table above . C=12, O=24,
D=13, E=14, space = 38, 3=3, 9=9.
Step 2: Add the values 12+24+13+14+38+3+9=113.
Step 3: Divide this number by 43. The remainder or modulo, 27, is the checksum.
Step 4: Referring to the table, 27 is the character R. Therefore, the checksum in the bar code should be
R. The final code reads “CODE 39R” when it is decoded.
Code 39 (3 of 9) Specications
Bar Code
Symbology
Bar Code
Type
Input Length Characters
Ideal Wide/
Narrow
Ratio
Ideal Narow
Dot Width
Checksum
Calculation
Code 39
39 Variable Refer text 2.5:1 2 none
39C Variable Refer text 2.5:1 2 mod 43
F39 Variable Refer text 2.5:1 2 none
F39C Variable Refer text 2.5:1 2 mod 43
continued
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