CountOf

 Function - Returns the number of items in an array.

Inputs

Input	Data Type	Range	Unit	Default	Description
ARR	Any				Declared array.

Outputs

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

Remarks

• 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.

Example

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

Examples

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);