Rockwell Automation 1772-LP3 PLC - 2/30 Programmable Controller Programming and Operations Manual - Manual (Page 325)

Appendix
B
BĆ1
Number Systems
There are four numbering systems used with programmable controllers.
They are:
Decimal
Octal
Binary
Hexadecimal
These numbering systems differ by their number sets and place values.
The decimal numbering system uses a number set made up of ten digits:
the numbers 0 through 9. All decimal numbers are composed of these
digits. The value of a decimal number depends on the digits used and the
place value of each digit.
Each place value in a decimal number represents a power of ten
(Figure B.1), starting with 100. The value of a decimal number is
determined by multiplying each digit by its corresponding place value and
adding these numbers together.
Figure B.1
Decimal Numbering System
2 3 9
2 x 10 1 = 200
10
3 x 10 1 = 30
10
9 x 10 0 = 9
10
200
30
9
239
10
10
B.0
General
B.1
Decimal Numbering System