32 Line Matrix Printer Code V Programmer's Reference Manual

UPC-E

207

Quiet Zone

Quiet zones extend on both ends of the bar code to permit the scan to begin

and end in a blank area. The Code V automatically produces an 11-module

wide left quiet zone; You are responsible for providing sufficient space

(minimum of 7 modules) on the form for the right quiet zone. A trailing quiet

zone is provided automatically if an add-on code has been specified in the bar

code command. The number system character is printed automatically in the

left quiet zone. If specified, the check digit is automatically printed in the right

quiet zone.

Start/Stop Codes

The Start/Stop codes are special character codes which extend into the

printed data field area, marking the start and stop portions of the bar code.

These codes are automatically produced.

Number System Character

The number system character field allows you to apply a code to a class or

type of item and is printed automatically in the left quiet zone. The first

character in the data field is used as the number system character.

Data Field

The bar code symbol uses a series of varying width bars and spaces to

represent a limited character set (numbers 0-9 and Special Characters Start

and Stop). The bars and spaces vary in width from 1 through 4 modules. Each

character consists of 2 bars and 2 spaces that total 7 modules. Six or 10 data

characters are expected, depending on the UPC-E bar code type (t) selected.

By modifying the syntax of the vendor number and product code, 10-digit data

is compressed down to 6 digits.

Readable Data

The optional readable data field provides a readable interpretation of the bar

code data.

Check Digit

The modulo-10 check digit is automatically calculated and inserted in the bar

code symbol and printed in the right quiet zone, if specified. The check digit

provides the means to verify accurate scanning. The number system

character is included in the check digit algorithm.