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14245L-003 Rev. A EPL Programming Guide 12/16/13
Automatic Data Matrix Bar Code Generation
The printer automatically tests and changes the Data Matrix bar code geometry to optimize the
symbol size per the specified column and row (p
4
- the c prefix and p
5
- the r prefix)
parameters. If no row or column parameters are specified, the printer will create a minimum
size symbol based on the calculated compressed size of the data. The number of columns and
rows in the symbol will be automatically determined with a preference towards the smallest
square symbol that will accommodate the compressed size.
The user may wish to force the number of rows and/or columns to a larger value to achieve
uniform symbol sizes.
32 32 124 91 62
36 36 172 127 86
40 40 228 169 114
44 44 288 214 144
48 48 348 259 174
52 52 408 304 204
64 64 560 418 280
72 72 736 550 368
80 80 912 682 456
88 88 1152 862 576
96 96 1392 1042 696
104 104 1632 1222 816
120 120 2100 1573 1050
132 132 2608 1954 1304
144 144 3116 2335 1558
Table 2 • Data Matrix Symbol Geometries
Rows Columns
Numeric
Capacity
..
Alpha-numeric
Capacity
_
Compressed
data size
_
1. Paired digits represent the best-case compression. Adjacent digit pairs can be encoded
into eight bits.
2. The implied compressibility requires the data be composed of either all lowercase or all
uppercase characters with digits and spaces allowed.
3. Any ASCII character (0–127) can be encoded one-to-one, extended ASCII (128-255)
requires an additional two-byte overhead.