CountOf

 Function - Returns the number of items in an array.

• The input must be an array and can have any data type.
• This function is particularly useful to avoid writing directly the actual size of an array in a program.
  • This keeps the program independent from the declaration.

Inputs

Input	Data Type See Data Types.	Range	Unit	Default	Description
ARR	ANY				Declared array.

Outputs

Output	Data Type See Data Types.	Range	Unit	Description
Q	DINT			Total number of items in the array.

Examples

   FOR i := 1 TO CountOf (MyArray) DO
      MyArray[i-1] := 0;
   END_FOR;

Array	Return
Arr1 [ 0..9 ]	10
Arr2 [ 0..4 , 0..9 ]	50

FBD Language Example

FFLD Language Example

• In the FFLD Language, the operation is executed only if the input rung (EN) is TRUE.
  • The output rung (ENO) keeps the same value as the input rung.
  • The function is executed only if EN is TRUE.

IL Language Example

Not available.

ST Language Example

Q := CountOf (ARR);