General rules for assigning parameters – Tally Genicom Matrix Printer User Manual

Page 40

7265 Programmer’s Manual

Values of all the adjustable bar code parameters are stored in NVRAM while power is off. You

can restore the bar code attributes to the factory settings by performing an ISU on the printer.

pn Attribute

style

height

human readable line enable

narrow bar width

wide bar width

narrow space width

wide space width

p8 N / A
p9

rotation

p10 horizontal print density
p11 check character
p12 human readable font
p13 height (in 1/24” increments)

General Rules for Assigning Parameters

You can send the sequence to modify bar code parameters any time except when bar code

mode is active.

If you assign a parameter value outside the permissible range, then that parameter value

reverts to the default value.

Values for narrow bars must be less than values for wide bars. Values for narrow spaces

must be less than values for wide spaces. The ratio between wide and narrow elements

should be about 3:1.

As with other ANSI escape sequences that take multiple parameters, you can use the semicolon

as a place holder when you want to change a higher-numbered parameter while leaving lower-

numbered parameters alone. For example, to set the horizontal print density to 60 dpi without

changing any other bar code attributes, you could send:

ESC [;;;;;;;;;0;;}

Semicolons that trail the last specified parameter are optional. For example, to turn off the

human-readable line without changing any other parameters, you could send:

ESC [;;0}

Or, you could send:

ESC [;;0;;;;;;;;;}

Note: The term “default” is misleading when applied to bar code parameters. This printer stores

bar code parameters in nonvolatile RAM while power is off; except for an ISU or an out-of-range

argument, you might never see the effects of the factory defaults. For this reason, your

application should probably initialize all 12 parameters one time before any symbols are sent.

This is particularly true when other bar code applications are sharing the printer.