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Mitsubishi Electronics FX3G User Manual

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FX
3S
/FX
3G
/FX
3GC
/FX
3U
/FX
3UC
 Series
Programming Manual - Basic & Applied Instruction Edition
18 Floating Point – FNC110 to FNC139
18.17 FNC129 – INT / Floating Point to Integer Conversion
11
FN
C30
-FN
C3
9
R
ota
tion and 
Shi
ft
12
FN
C40-FN
C49
D
ata O
perati
on
13
FNC
50-FNC
59
High-Speed
 
Proc
essing
14
FM
C60-FN
C69
H
andy 
In
struction
15
FN
C70-FN
C79
E
xternal
 F
X
 I/O
 
De
vice
16
FNC
80-FNC
89
External
 FX 
Dev
ice
17
FNC1
00-
FNC10
9
Dat
a 
Transfer 2
18
FNC1
10-
FNC139
Fl
oati
ng Poi
nt
19
FNC14
0-F
N
C
149
Da
ta
 
Operation 2
20
FNC1
50-
FNC159
Pos
itioning 
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 FX
3G
/FX
3GC
/FX
3U
/FX
3UC
 PLCs.
S2: This function is supported only in FX
3U
/FX
3UC
 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
X Y M T C S D .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