132
Sect
ion
6
Exp
la
nat
io
n of Te
rms
V500-R2 series
User’s Manual
Section 6
Appendix
Modulus check
This is a method to increase bar code reading reliability.
Numerical character or character obtained by specific calculating formula is applied to
the end of the data you want to express (also expressed as C/D: check digit in this
manual).
After reading a barcode, check the C/D with this calculating formula to avoid reading
failure. General check systems are the following three types.
Calculation method of modulus 10/3 weight
1.
Add the digits in the even positions (the rightmost character is the 1st digit), and
multiple it by 3.
2.
Add up the odd numbers (excluding the rightmost check digit) in the data digit.
3.
Add values of above clauses
1
and
2
, and add to the unit digit.
4.
The check digit is the reminder of 10 minus first digit of clause
3
.
[E.g.] When the bar code data is 4901234 (JAN-8)
Therefore, data with check character is "49012347".
System
Used barcode
Modulus 10/3
Used for barcodes with only numbers. Mainly used for EAN and ITF.
Modulus 43
Used for barcodes including alphabet. Mainly used for CODE39.
Modulus 16
Mainly used for Codabar(NW-7).
30 + 13 = 43 (1st digit is 3)
10 - 3 = 7•••Check digit
4 9 0 1 2 3 4
Even digit 4 + 0 + 2 + 4
= 10 10 x 3 = 30
Odd digit
9 + 1 + 3
= 13
Summary of Contents for V500-R2 Series
Page 1: ...Z334 E1 01A Cat No Fixed Laser Type Barcode Reader User s Manual V500 R2 Series...
Page 18: ...16 V500 R2 series User s Manual Introduction Contents Introduction MEMO...
Page 36: ...34 Section 2 Installation V500 R2 series User s Manual Section 2 Wiring and Installation MEMO...
Page 143: ......
