Intermec EasyCoder PL-Series, Руководство программиста

Страница: 57 / 220

Chapter 5— Linear Bar Codes
EasyCoder PL-Series Printer Programmer’s Reference Manual 39
Check Character Numerical Value Table
Char Value Char Value Char Value Char Value
0 0 C 12 O 24 - 36
1 1 D 13 P 25 . 37
2 2 E 14 Q 26
SPACE
38
3 3 F 15 R 27 $ 39
4 4 G 16 S 28 / 40
5 5 H 17 T 29 + 41
6 6 I 18 U 30 % 42
7 7 J 19 V 31 $ (full) 43*
8 8 K 20 W 32 % (full) 44*
9 9 L 21 X 33 / (full) 45*
A 10 M 22 Y 34 + (full) 46*
B 11 N 23 Z 35
* Full represents F39 or F39C for Full ASCII
Refer to the full bar code symbology specification for complete
information on checksum calculation. For a short example, take an
example bar code with the data CODE 39.
Step 1: Assign a value to each character per the Character Numerical
Value Table above (C = 12, O = 24, D = 13, E = 14, space = 38, 3 = 3,
9 = 9).
Step 2: Add the values (12 + 24 + 13 + 14 + 38 + 3 + 9 = 113).
Step 3: Divide this number by 43. The remainder or modulo, 27, is the
checksum.
Step 4: Referring to the table, 27 is the character R. Therefore, the
checksum in the bar code should be R. The final code reads CODE 39R
when it is decoded.
Code 39 (3 of 9) Specifications
Bar Code
Symbology
Bar Code
Type
Input
Length
Characters Ideal
Wide/Narrow
Ratio
Ideal Narrow
Dot Width
Checksum
Calculation
Code 39 39 Variable Refer to text 2.5:1 2 none
39C Variable Refer to text 2.5:1 2 mod 43
F39 Variable Refer to text 2.5:1 2 none
F39C Variable Refer to text 2.5:1 2 mod 43