Bar Codes
Printing Bar Codes
Generally, sending bar code information to the printer is performed in two steps:
Step 1: Selecting the bar code printing specifications; bar code type, height, and header control information.
Step 2: Moving the cursor to the desired label location and sending the bar code data.
Step 1.
Before positioning and printing the bar code data, the type of code, height of the label, and header placement may be specified. Once this is done, the succeeding labels will be printed using these specifications until a new type, height, or header control is specified. In other words, the bar code print specifications can be sent once and need not be sent again unless the printer is reset or new print specifications are desired. The following example specifies the print specifications for bar codes that are 0.5 inches in height, have a header above the label, and are printed in the UPC A code.
ESC*z8v5h1Q |
|
ESC*z8v | Select UPC A code |
5h | Label is to be .5 inches high |
1Q | Places header above bar code |
Notice that the last letter in the escape sequence (Q) is
Step 2.
To print a bar code label, the cursor must be placed in the desired position and the bar code data must be sent. The following escape sequence moves the cursor to column 25, sends the data “1234567” to the printer, and initiates printing.
ESC*z25c<1234567>Z
ESC*z25c Places start of label at column 25
<Indicates start of bar code data
1234567 Bar code data
>Signals end of bar code data
Z | Upper case Z initiates printing * |
*Note that an
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