Delta Electronics DVP15MC11T User Manual

Chapter 8 Logic Instructions
8_
8.14.7 LEN
FB/FC
Explanation
Applicable
model
FC
LEN calculates the number of characters in a string. DVP15MC11T
 Parameters
Parameter
name
Meaning
Input/
Output
Description Valid range
In String Input String
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.
Boolean
Bit string Integer
Real
number
Time, date
String
BOOL BYTE WORD DWORD LWORD USINT UINT UDINT ULINT SINT INT DINT LINT REAL LREAL TIME DATE TOD DT STRING
In
●
Out
●
Note:
The symbol ● indicates that the parameter is allowed to connect to the variable or constant of the data type.
 Function Explanation
The LEN instruction finds the number of characters in a string and the result is output to Out. For
example, when the string is ABCDEFGH, the value of Out is 8.
 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 LEN_In string is ’AaBbCcDd’. As LEN_EN is TRUE, the value of Out1 is 8.
 The variable table and program
Variable name Data type Current value
LEN_EN
BOOL
TRUE
LEN_In
STRING
AaBbCcDd
Out1 UINT 8
LEN
EN ENO
In Out
1
LEN
EN ENO
In Out
LEN_EN
LEN_In Out1
8-199

Delta Electronics DVP15MC11T Specifications

General

Brand	Delta Electronics
Model	DVP15MC11T
Category	Controller
Language	English