Mitsubishi FX3G Series Programming Manual

510
FX3G/FX3U/FX3GC/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
18 Floating Point – FNC110 to FNC139
18.17 FNC129 – INT / Floating Point to Integer Conversion
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
S: This function is supported only in FX3U/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 VZModifyKH E ""P
33 S 3
33 S 3
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 

Mitsubishi FX3G Series Specifications

General

Model	FX3G Series
Power Supply	AC 100-240V or DC 24V
Program Capacity	32, 000 steps
Execution Speed	0.21 µs/basic instruction
Communication Options	RS-422, USB, Ethernet
Expansion Modules	Analog, digital, communication
Programming Language	Ladder Logic, Instruction List
Built-in Functions	High-speed counters, pulse output
Analog I/O	Available via expansion modules