Panasonic FP7 Series - LN (Natural Logarithmic Operation)

11.12 LN (Natural Logarithmic Operation)
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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 Calculation target data (device address or constant) (real number value)
D Calculation result (device address)
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Available devices (●: Available)
Operan
d
16-Bit device:
32-Bit
device:
Integer
Real
numbe
r
St
rin
g
Index
modifie
r
(Note 1)
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
2)
K Ｕ H
SF
(N
ote
3)
D
F
(N
ote
4)
" "
S ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
D ● ● ● ● ● ● ● ● ● ● ● ●
(Note 1) Only 16-bit devices, and 32-bit devices can be modified (real number constants cannot be specified).
(Note 2) Index register (I0 to IE)
(Note 3) Can be specified only when the operation unit is a single-precision floating point real number (SF).
(Note 4) Can be specified only when the operation unit is a double-precision floating point real number (DF).
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Outline of operation
● According to the operation unit [i], LN (natural logarithm) for the real number value stored in
the area starting with [S] is calculated.
● The calculation result is stored in the area starting with [D].
LN([S]) → [D]
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Processing
● LN (calculation target data) is calculated, and set for the calculation result.
11.12 LN (Natural Logarithmic Operation)
WUME-FP7CPUPGR-12 11-25