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FX3S/FX3G/FX3GC/FX3U/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
12 Data Operation – FNC 40 to FNC 49
12.10 FNC 49 – FLT / Conversion to Floating Point
12.10 FNC 49 – FLT / Conversion to Floating Point
Outline
This instruction converts a binary integer into a binary floating point (real number).
1. Instruction format
2. Set data
3. Applicable devices
S1: This function is supported only in FX3G/FX3GC/FX3U/FX3UC PLCs.
S2: This function is supported only in FX
3U/FX3UC PLCs.
Explanation of function and operation
1. 16-bit operation (FLT and FLTP)
The binary integer data of is converted into binary floating point (real number), and stored to [ +1, ].
2. 32-bit operation (DFLT and DFLTP)
The binary integer data of [ +1, ] is converted into binary floating point (real number), and stored to
[+1, ].
Related instruction
Caution
1. It is not necessary to convert a constant (K or H) into a floating point value.
The value of a K or H specified in each instruction for binary floating point (real number) operation is automatically
converted into binary floating point (real number). It is not necessary to convert such a constant with the FLT
instruction.
(K and H cannot be specified in RAD, DEG, EXP and LOGE instructions.)
Operand type Description Data type
Data register number storing binary integer 16- or 32-bit binary
Data register number storing binary floating point (real number) Real number (binary)
Oper-
and
Type
Bit Devices Word Devices Others
System User Digit Specification System User
Special
Unit
Index
Con-
stant
Real
Number
Charac-
ter String
Pointer
XYMTCSD.b
KnX KnY KnM KnS
TCDRU\G V Z Modify K H E ""P
S1 S2
S1 S2
Instruction Description
INT (FNC129) Inverse of the FLT instruction, converts binary floating point into binary integer.
DFLT
DFLTP
Mnemonic Operation Condition
P
FNC 49
FLT
D
16-bit Instruction
5 steps
FLT
FLTP
Mnemonic Operation Condition
Continuous
Operation
Pulse (Single)
Operation
32-bit Instruction
9 steps
Continuous
Operation
Pulse (Single)
Operation
S
1
S
D
S
1
S
D
D
1
S
D
1
D
D
1
D
Command
input
→
( + 1, )
FNC 49
FLT
S
D
S
D
Binary
integer
D
Binary floating point
(real number)
D
1
S
D
1
S
D
1
D
D
1
D
Command
input
FNC 49
DFLT
S
D
( + 1, )
→
( +1, )
S
S
D
D
Binary integer Binary floating point
(real number)