Mitsubishi Electric melsec q00ujcpu User Manual page 81

(b) Calculation example
Calculation examples are shown below. (The "X" in (nnnnnn)
1)
Storing "10"
(10)
10
Sign:
Exponent:
Mantissa:
In this case, the value will be encoded as 4014000000000000
Sign Exponent
0 1 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
4 0 1
2)
Storing "0.75"
(0.75)
10
Sign: Positive
Exponent: -1
Mantissa: (
In this case, the value will be encoded as 3FD8000000000000
Sign Exponent
0 0 1 1 1 1 1 1 1 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
3 F D
Values after the decimal point (in binary) is calculated as follows.
Example
(0.1101) 2
2 =
2 - 42
(1010) (1.010000.....
2
Positive 0
3 401 (100 0000 0001)
H
(
0100 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
4 0 0
(0.11) (1.100..... 2
2
0
3FD (011 1111 1101)
H
1000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
8 0 0
(0.1101)
2
0. 1
The bit represents 2
-1 -2 -4
+ 2 + 2 0.5 + 0.25 + 0.0625
=
3
2 )
2
2
Mantissa
0 0 0 0
-1
)
2
2
Mantissa
0 0 0 0
1
-1
The bit represents 2
(0.8125)
= 10
indicates the numeral system used.)
x
)
2
.
H
0 0 0 0
)
2
.
H
0 0 0 0
0
-2 -3
The bit represents 2 The bit represents 2
0 0
0 0
1
-4