Mitsubishi Electronics FX3G User Manual
501
FX
3S
/FX
3G
/FX
3GC
/FX
3U
/FX
3UC
Series
Programming Manual - Basic & Applied Instruction Edition
18 Floating Point – FNC110 to FNC139
18.5 FNC117 – EVAL / Character String to Floating Point Conversion
11
FN
C30
-FN
C3
C30
-FN
C3
9
R
ota
tion and
Shi
ft
ft
12
FN
C40-FN
C40-FN
C49
D
ata O
perati
perati
on
13
FNC
50-FNC
59
High-Speed
Proc
essing
14
FM
C60-FN
C60-FN
C69
H
andy
In
struction
15
FN
C70-FN
C70-FN
C79
E
xternal
F
X
I/O
De
vice
16
FNC
80-FNC
89
External
FX
Dev
ice
ice
17
FNC1
00-
FNC10
00-
FNC10
9
Dat
a
a
Transfer 2
18
FNC1
10-
FNC139
FNC139
Fl
oati
ng Poi
nt
19
FNC14
0-F
N
C
149
Da
ta
Operation 2
20
FNC1
50-
FNC159
FNC159
Pos
itioning
itioning
Control
2) In the program shown below, a character string stored in D10 and later is converted into binary floating point, and
stored to D100 and D101 when X000 turns ON
Operations at overflow, underflow and zero
Condition
Operation
The absolute value of the conversion
result is less than "2
result is less than "2
−126
".
The value of
is the minimum value (2
−126
) of 32-bit real numbers and the borrow flag
M8021 turns ON.
The absolute value of the conversion
result is not less than "2
result is not less than "2
128
".
The value of
is the maximum value (2
128
) of 32-bit real numbers and the carry flag M8022
turns ON.
The conversion result is true "0".
(The mantissa part is "0".)
(The mantissa part is "0".)
The zero flag M8020 turns ON.
X000
FNC117
DEVALP
D10
D100
b15
b8 b7
b0
D11
Ignored.
D101
1.2345E
−2
20H(space)
2EH(.)
33H(3)
35H(5)
20H(space)
31H(1)
32H(2)
34H(4)
2DH(-)
45H(E)
Rounded.
D10
D13
D12
D16
D14
32H(2)
30H(0)
D15
D100
3 4 5
2
1
0
E
2
END
00H
D
D