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FX3S/FX3G/FX3GC/FX3U/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
18 Floating Point – FNC110 to FNC139
18.17 FNC129 – INT / Floating Point to Integer 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
18.17 FNC129 – INT / Floating Point to Integer Conversion
Outline
This instruction converts binary floating point data into a binary integer which is a normal data format inside PLCs
(binary floating point → binary integer).
→ For program examples of floating point operations, refer to Section 12.10.
→ For handling of floating point, refer to Subsection 5.1.3.
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 (INT and INTP)
Binary floating point stored in [ +1, ] is converted into a binary integer, and transferred to .
Instruction for inverse conversion
The inverse conversion is executed by FLT (FNC 49) instruction.
→ For FLT (FNC 49) instruction, refer to Section 12.10.
2. 32-bit operation (DINT and DINTP)
Binary floating point stored in [ +1, ] is converted into a binary integer, and transferred to [ +1,
].
Instruction for inverse conversion
The inverse conversion is executed by DFLT (FNC 49) instruction.
→ For FLT (FNC 49) instruction, refer to Section 12.10.
Operand Type Description Data Type
Data register number storing binary floating point data to be converted into a binary
integer
Real number (binary)
Data register number storing a converted binary integer 16- or 32-bit 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 T C D R U\G V Z Modify K H E ""P
S1 S2
S1 S2
P
FNC 129
INT
D
16-bit Instruction
5 steps
Mnemonic Operation Condition
Continuous
Operation
Pulse (Single)
Operation
INT
INTP
DINT
DINTP
Mnemonic Operation Condition
32-bit Instruction
9 steps
Continuous
Operation
Pulse (Single)
Operation
S
D
S
D
S
S
D
Command
input
FNC129
INT
S
D
→
16-bit binary integer
The decimal part is cut.
+1,
Binary floating
point
S
D
S
S
S
D
D
Command
input
FNC129
DINT
S
D
→
+1,
32-bit binary integer
The decimal part is cut.
+1,
Binary floating
point
S
D
S
D