Delta Electronics DVP15MC11T, Руководство по эксплуатации

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DVP15MC11T Operation Manual
_8
8.14.8 FIND
FB/FC Explanation
Applicable
model
FC FIND searches for the position of a specified string in another string. DVP15MC11T

Parameters
Parameter
name
Meaning
Input/
Output
Description Valid range
In1 String Input String
Depends on the data type of the
variable that the input parameter is
connected to.
In2
Key characters to
search for
Input
Key characters to
search for
Depends on the data type of the
variable that the input parameter is
connected to.
Out
Number of
characters
Output
Number of
characters
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
In1
●
In2
●
Out
●
Note:
The symbol
●
indicates that the parameter is allowed to connect to the variable or constant of the data type.

Function Explanation

The Find instruction takes the characters in In2 as key characters and searches for the position of
key characters in the string In1 . For example, as In1 is ABCDEFGH and In2 is DE, the value of Out
is 4.

The search starts from the first character in the string In1.

If multiple In2 strings exist in In1 , the value of Out is the position of the first In2 from the beginning of
In1 .

Precautions for Correct Use
The input variables are not allowed to omit. An error will occur during the compiling of the software if the
input variables are omitted. But the output variable is allowed to omit.

Programming Example

The FIND_In1 string is ’AaBbCcDd’ and the FIND_In2 string is ’Cc’. As FIND_EN is TRUE, the
value of Out1 is 5.
F I ND
EN ENO
In1 Ou t
In2
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