Page 71 - Programmable Logic Controllers, Fifth Edition

Table 3-6 Numeric Values in Decimal, Binary, BCD,
and Hexadecimal Representation
Decimal Binary BCD Hexadecimal
0 0 0000 0
1 1 0001 1
2 10 0010 2
3 11 0011 3
4 100 0100 4
5 101 0101 5
6 110 0110 6
7 111 0111 7
8 1000 1000 8
9 1001 1001 9
10 1010 0001 0000 A
11 1011 0001 0001 B
12 1100 0001 0010 C
13 1101 0001 0011 D
14 1110 0001 0100 E
15 1111 0001 0101 F
16 1 0000 0001 0110 10
17 1 0001 0001 0111 11
18 1 0010 0001 1000 12
19 1 0011 0001 1001 13
20 1 0100 0010 0000 14

126 111 1110 0001 0010 0110 7E
127 111 1111 0001 0010 0111 7F
128 1000 0000 0001 0010 1000 80

510 1 1111 1110 0101 0001 0000 1FE
511 1 1111 1111 0101 0001 0001 1FF
512 10 0000 0000 0101 0001 0010 200

Decimal number 7 8 6 3

BCD 0 1 1 1 1 0 0 0 0 1 1 0 0 0 1 1 BCD
number

4 bits used for
each decimal digit
Figure 3-12 The BCD representation of a decimal number.

52 Chapter 3 Number Systems and Codes

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