Chapter 3 Bar Codes

Quiet Zone

Both ends of the bar code structure require blank quiet zones. The quiet zones must be at least 0.25 inches wide and completely blank to ensure accurate reading of the start/stop codes and to prevent adjacent bar codes from overlapping. Be sure to provide sufficient space on the form for the quiet zones.

Start/Stop Codes

The start/stop codes identify the leading and trailing end of the bar code. Each of the UPS 11 subsets uses a unique start code and a common stop code, both automatically provided by the IGP/PGL.

Data Field

UPS 11 is a special case of Code 128 (page 108). This bar code is restricted to 10 data characters. The first character must be 0 through 9 or A through Z. The remaining nine digits must be 0 through 9.

Readable Data

The optional readable data field provides a readable interpretation of the bar code data. It can be printed above or below the bar code symbol.

Check Digit

The modulo-103 check digit is automatically calculated and inserted in the bar code symbol. The check digit verifies accurate scanning. The start code is included in the check digit algorithm.

UPS 11 Command Format

BARCODE

UPS11; [DIR;] [MAG;] [Hn[.m];] [BFn;L;] [DARK;] SR; SC [(D)data field(D)]

[PDF [;LOC] [;FONT]]

STOP

BARCODE

The Bar Code command; enter BARCODE.

UPS11

Designates bar code type UPS 11; enter UPS11.

DIR

Optional parameter that allows for rotating a

 

barcode. Enter CW for clockwise rotation. Enter

 

CCW or VSCAN for counter-clockwise rotation.

 

Enter INV for inverted rotation. If DIR is not

 

entered, the barcode is horizontally oriented.

MAG

Optional parameter to magnify (horizontally

 

expand) the bar code symbol. The magnification

 

default value is X1. Increasing the magnification

 

adjusts printed character density as shown in Table

 

8. You can also use XR or XRD as defined on page

 

89. (You must specify 8 digits for MAG for variable

 

ratio.)

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Printronix LQH-HWTM manual Quiet Zone, UPS 11 Command Format