11.33 DROFF (Conversion: Double-precision Real Number → Integer
(Round to the Nearest Unit))
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Ladder diagram
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Available operation units (●: Available)
Operatio
n unit
bit US SS UL SL SF DF
i ● ● ● ●
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List of operands
Operand Description
S
Starting address of the device where the target data to be converted is stored or the constant
(data format: double-precision real number data)
D
Starting address of the device where the target data to be converted is stored or the constant
(data format: according to the operation unit)
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Devices that can be specified (indicated by ●)
Operan
d
16-Bit device:
32-Bit
device:
(Note 1)
Integer
Real
numbe
r
St
rin
g
Index
modifie
r
(Note 2)
W
X
W
Y
W
R
W
L
W
S
S
D
D
T
L
D
U
M
WI
W
O
TS
C
S
TE
C
E
IX
(N
ote
3)
K U H SF
D
F
" "
S ● ● ● ● ● ● ● ● ● ● ● ● ● ●
D ● ● ● ● ● ● ● ● ● ● ● ●
(Note 1) Cannot be specified when the operation unit is 16-bit integer (SS, US).
(Note 2) Only 16-bit devices, 32-bit devices, and integer constants can be modified. (Real number constants,
and character constants cannot be specified.)
(Note 3) Index register (I0 to IE)
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Outline of operation
● This instruction converts the double-precision floating point real number data stored in the
area starting with [S] to an integer (rounding the first decimal point off).
● The conversion result is stored in the area starting with [D].
●
The data setting ranges for conversion target data [S] by operation units are indicated below.
11.33 DROFF (Conversion: Double-precision Real Number → Integer (Round
to the Nearest Unit))
11-78 WUME-FP7CPUPGR-12