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Mobile Printing Systems
CPCL Programming Manual
Section 5
Linear Bar
Codes
pg. 5-11
Codabar
Codabar is ideal for applications that contain mostly numeric symbols that may vary in length from bar
code to bar code. It can encode the digits from 0 to 9, the characters “-”(dash), “$”(dollar sign), “:” (colon),
“/” (forward slash), “.” (period), and “+” (plus) as well as start/stop characters A through D.
One optional checksum is automatically appended as the least significant digit in the bar code data
directly before the stop character. The bar code symbology specification contains all the information on
calculating the checksum. As a short example, our data will be “A37859B” where A and B are start/stop
characters. The characters 0 through 9 are assigned the numerical values 0 through 9 respectively. “-” is
10, “$” is 11, “:”is 12, “/” is 13, “.” is 14, “+” is 15, and start/stop characters A B C and D are 16, 17, 18, and 19
respectively.
Step 1: Add the numerical value of all the characters. 16 + 3 + 7 + 8 + 5 + 9 + 17 = 65.
Step 2: Divide this number by 16 and use the remainder, or modulo. In our example, this is 1
Step 3: Subtract the modulo from 16. This is the smallest number that can be added to the sum in step 1
to make a multiple of 16. (65 + 15 =80. 80 /16= 5) Therefore, the check sum for our example is 15.
Step 4: The character that corresponds to 15 is “+” and is added in before the stop character. Our final
bar code looks like “A37859+B”.
The bar code type NW7 is for reverse compatibility only. We do not recommend using this command for
new systems. There is no difference between CODABAR and NW7.
Codabar Specications
Bar Code
Symbology
Bar CodeType
Input
Length
Characters
Ideal Wide/
Narrow
Ratio
Ideal
Narrow Dot
Width
Checksum
Calculation
Codabar
CODABAR Variable 0-9,A-D,
symbol
2.5:1 2 none
CODABAR 16 Variable 0-9,A-D,
symbol
2.5:1 2 mod 16
continued
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