Delta Electronics DVP15MC11T, Operation Manual

Page: 163 / 601

DVP15MC11T Operation Manual
_8
8.8.18 LN
FB/FC Explanation Applicable model
FC
LN is used to find the natural logarithm of a number and the result is output
to Out .
DVP15MC11T

Parameters
Parameter
name
Meaning
Input/
Output
Description Valid range
In
Number to
process
Input Number to process
Depends on the data type of
the variable that the input
parameter is connected to.
Out Logarithm Output The natural logarithm of In
Depends on the data type of
the variable that the output
parameter is connected to.
B
ool
ean
Bit string Integer
Real
number
Time, date
St
rin
g
B
O
O
L
BYT
E
WO
RD
D
WO
R
D
L
W
O
R
D
U
SI
N
T
U
IN
T
U
DI
NT
U
L
INT
SI
N
T
IN
T
D
IN
T
L
IN
T
R
EAL
L
R
EAL
T
IM
E
D
AT
E
TOD
D
T
ST
R
IN
G
In
● ● ● ● ● ● ● ● ● ● ● ● ● ●
Out
●
Note:
The symbol
●
indicates that the parameter is allowed to connect to the variable or constant of the data type.

Function Explanation

LN is used to calculate the natural logarithm of the input parameter In, that is the logarithm with e
（
e=2.718282
）
as the base , and the result is output to Out .
LN
EN ENO
In Ou t
1
1
0
2 .7 18 2 8 2
In
Ou t
8-92