Epson FX-880 User Manual page 180

The valid data of each barcode type is described below. If invalid data is
included in the barcode data string, the barcode is not printed.
Barcode type
EAN-13
EAN-8
UPC-A
UPC-E
Interleaved 2 of 5
POSTNET
Code 39
Code 128
The following conditions are required for barcode printing:
Barcode printing is always performed unidirectionally. However,
when it is mixed with raster bit image data, neither barcode nor
raster bit image data is printed.
A barcode is not printed when part of the barcode extends beyond
the right margin.
When barcode data and text data are mixed in a data sequence,
barcodes, and text are printed in the same place.
The start and stop (*) characters of Code 39 are added to human
readable characters.
The initial data of Code 128 (Set A, B, or C) is identified as the first
data of Code 128, and must be hexadecimal (41, 42, and 43,
respectively).
When Code 128 Set C and Interleaved 2 of 5 are selected, barcode
data requires an even number data string. However, if an odd
number string is sent, a 0 is automatically added, making it an even
number data string.
The barcode print start position (except for POSTNET) is always
7/72 inches above the baseline.
B-14
Specifications
Barcode data
0-9 (Hex 30-39)
0-9 (Hex 30-39)
0-9 (Hex 30-39)
0-9 (Hex 30-39)
0-9 (Hex 30-39)
0-9 (Hex 30-39)
0-9 (Hex 30-39), (Hex 41-5A), (Hex 20, 24, 25, 2B, 2D,
2E, 2F)
Set A, Set B, Set C