Floating-Point Value Conversion 64-Bit Into 32-Bit: Sflt - Mitsubishi Electric R16MTCPU Programming Manual

Floating-point value conversion 64-bit into 32-bit: SFLT

Format
SFLT(S)
Setting data
■Usable Data
: Usable
Setting Usable Data
data
Bit
device

(S)
■Description, data type of result
Setting data Description
(S) Data which will be converted into 32-bit floating-point value
Processing details
• The 64-bit floating-point (double precision real number) value stored in the device specified with (S) is converted into the
32-bit floating-point (single precision real number) value. Convertible data ranges are shown below.
38
-3.40  10 to -1.18  10
• The 64-bit floating-point type is used as the data of floating-point type in the Motion SFC program. Use this instruction to
output the data into the external devices that cannot use the 64-bit floating-point type.
The number of effective digits of 32-bit floating-point value data is approx. 7 digits. Data in the seven digits or
later of conversion result by SFLT instruction may not match the (S) data.
Operation error
An operation error will occur if:
• The (S) data is not a valid 64-bit floating-point type.
• The (S) data after convert is outside the range of 32 bit floating-point type.
Program example
■Program which converts the 64-bit floating-point value data of #0F into 32-bit floating-point
value data and substitutes the result to D2000L
D2000L = SFLT(#0F)
D2001
D2000L K-1.0
4 OPERATION CONTROL PROGRAMS
176
4.9 Type Conversions
Number of basic steps
4
Word device
16-bit 32-bit 64-bit
integer integer floating
type type (L) point
type (F)
  
-38 -38
, 0.0, 1.18  10
D2000
Usable steps
F/FS

Constant
16-bit 32-bit 64-bit
integer integer floating
type type point
(K/H) (K/H, L) type (K)
  
38
to 3.40  10
(single precision real number)
#3 #2 #1
#0F K-1.0
G

Calculation Bit
expression conditional
expression
 
Data type of result
32-bit floating-point type
#0
Comparison
conditional
expression
