ZEBRA MZ 320 Programming Manual

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Mobile Printing Systems

CPCL Programming Manual

Section 5

Linear Bar

Codes

pg. 5-9

Interleaved 2 of 5 Bar Codes

The Interleaved 2 of 5 (or ITF) bar code is used for applications that have a fixed data length for all

items scanned. A date, telephone number, or a SKU of fixed length would be a good application for

this bar code. The symbology specification states that a ITF bar code may be partially decoded without

any recognizable difference. Therefore, to prevent this problem, you must keep the length of data to

a constant and perform an error checking routine on the decoding program to determine if the data is

correct.

Only the digits 0-9 can be encoded, and there should be an even number of digits in the data. If there is

an odd number of digits, the printer will automatically insert a zero (0) at the beginning of the bar code.

There are two bar code varieties with a checksum: Interleaved 2 of 5 “with checksum” and German Post

Code. German Post Code has fixed length – either 12 or 14 characters (including checksum).

Here is an example how to calculate modulo 10 checksum:

Step 1: To calculate the checksum, first ensure that you are starting with an odd number of digits in the

data. If not, add a zero (0) to the beginning of the data.

Step 2: Multiply every other digit by 3, and add up the numbers. So, if your data was “43827” your

calculation should be (4 x 3) + 3 + (8 x 3) + 2 + (7 x 3) = 62.

Step 3: Divide this number by 10, resulting in 6 with a remainder of 2. Subtract the remainder from 10.

In our example, 10 - 2 = 8. The checksum is this final number, 8. Append this to the end of your data.

Note that if the remainder was a zero, your checksum should be zero.

Interleaved 2 of 5 Specications

Bar Code

Symbology

Bar Code

Type

Input Length Characters Ideal Wide/

Narrow Ratio

Ideal Narrow

Dot Width

Checksum Calculation

Interleaved 2 of 5 I2OF5 Varies 0-9 only 2.5:1 2 See text

Interleaved 2 of 5

with checksum

I2OF5C Varies 0-9 only 2.5:1 2 See text

German Post

Code

I2OF5G 11, 12,13 or 14 0-9 only 2.5:1 2 mod 10, weights 4,9

continued

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ZEBRA MZ 320 3" 4mb Direct Mobile Thermal Receipt Printer With Bluetooth