Zebra A300 Specifications download pdf (Page 27)

Additionally, each bar code field instruction can be issued with a defi-

nition parameter string. The parameter string defines field rotation,

height, and interpretation line status for all bar codes. For some bar

codes, the parameter string also sets a check digit, start character,

and/or stop character. Use the definition parameter string to command

the printer to print bar codes of appropriate heights and densities that

conform to the specifications of the application.

The use of the parameter string is optional since all parameters have

default values. If the default values for all of the bar code parameters

suit the application, then only the bar code instruction needs to be

entered.

Parameters in bar code field instructions are ‘position specific.’ If a

value (other than the default value) is manually entered for one

parameter, a comma“,”the ZPL II delimiter character, must be

used to mark the position of the preceding parameters in the string.

To change just the third parameter, enter two commas and then the

value for the third parameter. The default values will be automati-

cally used for the first and second parameters. The following is

an example of how this would actually be entered in the ZPL II

label format.

In our sample label example from Chapter 4, Exercise #9 on page63, a

^B3 bar code field instruction is selected that has five parameters.

The third parameter defines the height of the bar in dots. The bar code

is to be printed using default values for the first two parameters

EXCEPT the height of the bar. This is to be 228 dots. Finally, the

“N” indicates that a print interpretation line will not print with the bar

code. The instruction would be entered as follows:

^B3,,228,N )

NOTE: Delimiters (commas) are not required for parameters

between a manually entered value and the end of the parameter

string.

18 CHAPTER 2

ZPL II Basics

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Zebra A300 Specifications Page 27