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FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
18 Floating Point – FNC110 to FNC139
18.5 FNC117 – EVAL / Character String to Floating Point Conversion
11
FNC30-FNC39
Rotation and
Shift
12
FNC40-FNC49
Data Operation
13
FNC50-FNC59
High Speed
Processing
14
FMC60-FNC69
Handy
Instruction
15
FNC70-FNC79
External FX I/O
Device
16
FNC80-FNC89
External FX
Device
17
FNC100-FNC109
Data
Transfer 2
18
FNC110-FNC139
Floating Point
19
FNC140-FNC149
Data
Operation 2
20
FNC150-FNC159
Positioning
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
−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
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 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 4 521 0E 2
END
00H
D
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