Code 39 Advanced Features And Functions - Worth Data TriCoder t53 User Manual

Code 39 Advanced Features and Functions

Mod 43 Check Character
Standard Code 39 can be printed with a "Mod 43 Check Character". This
Mod 43 check character cannot be used with Full ASCII Code 39. The
check character is derived by assigning a value to each character in the data
to be bar coded from the table as follows:
Char value
0 0
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
A 10
Table A-1. Mod 43 Check character calculation for Code 39
Here is an example to illustrate how the check character is
calculated for bar code data of 123XYZ:
1. Take the sum of the values assigned to each character:
1 + 2 + 3 + 33 + 34 + 35 = 108
1
2. Divide the sum by 43: (thus the name modulus 43)
108/43 = 2 with a Remainder of 22
3. Find the character corresponding with the remainder.
M (value 22) is the CHECK CHARACTER
The data becomes 123XYZM, with M added as the Mod-43 check
character.
Char value
B
C
D
E
F
G
H
I
J
K
L
2 3 X Y
Char
11 M
12 N
13 O
14 P
15 Q
16 R
17 S
18 T
19 U
20 V
21 W
Z
H-2
value Char
22 X
23 Y
24 Z
25 -
26 .
27 space
28 $
29 /
30 +
31 %
32
value
33
34
35
36
37
38
39
40
41
42