Tally Genicom Matrix Printer - Manual (Page 368)

All values are only valid when a new colour ribbon is used. They change depending on
the degree of wear:
narrow bar: approx. -0.05 mm
narrow space: approx. +0.05 mm.
The Code EAN 128, as the EAN/UPC, is based on module widths. Therefore only the X
parameter is valid for this type. This parameter is also used for the Y parameter (narrow
bar width). The Z parameter has no meaning. In combination with the normal/condensed
feature, 8 widths result (see table 1).
Error Code Wrong characters in a control code or in a barcode test (e.g. an undefined character in a
certain barcode Type) cause the barcode error sign to be printed.
Barcode Printing 13