The relation among bits, nibbles, bytes, words, and double words in the binary system is shown below.
b31b30 b29 b28 b27b26 b25 b24b23
b22 b21 b20b19 b18 b17b16 b15b14 b13
b12b 11 b10
b9 b8
b7
b6
b5 b4
b3
b2 b1 b0
NB0NB1NB2N
B3NB4NB5NB6NB7
BY3 BY2 BY1 BY0
W1
DW
W0
Double word
Word
Byte
Nibble
Bit
The PLC uses four types of values to execute the operation according to different control purposes. The following
illustrates the values of these functions.:
1. Binary number (BIN)
The PLC uses the binary system to operate the values.
2. Decimal number (DEC)
The PLC uses decimal numbers for;
The setting value of a timer (T) or the setting value of a counter (C/HC); for example, TMR C0 50
(constant K).
The device number; for example, M10 and T30 (device number)
The number before or after the decimal point; for example, X0.0, Y0.11, and D10.0 (device number).
The constant K: used as the operand in an applied instruction. For example, MOV 123 D0
(constant K).
3. Binary-coded decimal (BCD)
A decimal value is represented by a nibble or four bits, so that sixteen consecutive bits represent a
four-digit decimal value.
4. Hexadecimal number (HEX)
The PLC uses hexadecimal numbers for;
the constant 16#: used as the operand in an applied instruction; for example, MOV 16#1A2B D0
(hexadecimal constant).
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Send Quote Requests to info@automatedpt.com
Call +1(800)985-6929 To Order or Order Online At Deltaacdrives.com
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