ISNAN

 Function - Checks if the input value is not a number.

• The IEEE standard for floating point value encoding has specific values for:
  • Infinite - the result of a division by 0 (zero).
  • Not a number - the result of 0 / 0.
• The DIV operations are interpreted and never result in a division by 0 (zero).
  • An invalid value may come through an IO driver or protocol.

Inputs

Input	Data Type See Data Types.	Range	Unit	Default	Description
IN	REAL				Floating point value.

Outputs

Output	Data Type See Data Types.	Range	Unit	Description
Q	BOOL			TRUE if the input value is not a number.

FBD Language Example

FFLD Language Example

Not available.

IL Language Example

Not available.

ST Language Example

Not available.