Metrologic Instruments IS1000 manual Start/Stop, Modulo 43 Algorithm

3.2.7.Start/Stop

This function activates the transmission of the start and stop characters (sign ¸).

NOT TRANSMITTED *

TRANSMITTED

3.2.8.Modulo 43 Algorithm

Code 39 is strongly self checked and most situations do not require a check character. If a specific application requires exceptional data security, a check character can be added as the last character of the code.

Example:

Message: 12345/ABCDE

Sum of values: 1 + 2 + 3 + 4 + 5 + 40 + 10 + 11 + 12 + 13 + 14 = 115

Divide 115 by 43. The quotient is 2 with the remainder 29. The check character is the character corresponding to the value of the remainder, which is 29 in this example, corresponding to the character T.

The complete message, including check character is: 12345/ABCDET. Numerical value assignments for computing the optional check character:

Character	Value	Character	Value	Character	Value
0	0	F	15	U	30
1	1	G	16	V	31
2	2	H	17	W	32
3	3	I	18	X	33
4	4	J	19	Y	34
5	5	K	20	Z	35
6	6	L	21	-	36
7	7	M	22	.	37
8	8	N	23	Space	38
9	9	O	24	$	39
A	10	P	25	/	40
B	11	Q	26	+	41
C	12	R	27	%	42
D	13	S	28
E	14	T	29

START OF CONFIGURATION	END OF CONFIGURATION
IS1000 – Configuration Guide	27