Delta AS Series Operation Manual page 259

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The relation among bits, nibbles, bytes, words, and double words in the binary system is shown below.
N B7
b31 b30 b29 b28 b27 b26 b25 b24b23 b22 b21 b20 b19 b18 b17 b16 b15 b14 b13 b12 b11 b10
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)
3. Binary-coded decimal (BCD)
4. Hexadecimal number (HEX)
W 1
B Y 3 B Y 2
N B6 N B5
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).
A decimal value is represented by a nibble or four bits, so that sixteen consecutive bits represent a
four-digit decimal value.
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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D W
W 0
B Y 1
N B4 N B3 N B2
b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
D ouble w ord
W ord
B Y 0
B yt e
N B1 N B0
N ib ble
B it