EXP

Type Function

Description Calculates the natural exponential of the operand connected to IN1.

Parameters Input
IN1

Data type: ANY_REAL

Description: Exponent to base e.

Output
OUT

Data type: ANY_REAL

Description: Output value.

Error behavior Error behavior

The following table shows the errors which may occur while executing the function and the value returned by the function in the corresponding error case. As described, the value returned by the function in the error case depends on the value of the input (for example, if the input value is not a legal number (NaN), the function returns NaN).

Error case Output value

Result > REAL_MAX or LREAL_MAX Inf+

NaN NaN

Inf+ Inf+

Inf- 0

Additional information EN/ENO behavior

The POU is only executed if TRUE is applied to the EN input. If EN = FALSE, the POU is not executed and ENO = FALSE indicates the inactivity.

If any of the errors listed under "Error behavior" occurs while executing the function, ENO is set to FALSE.

Note
ENO stays TRUE for a result that is not a real number (NaN) or a positive infinity (inf+) value.

Further Info
See the topic "General information on execution control with EN/ENO" for further details.