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• IS_NAN

IS_NAN

Type	Function
Description	Checks whether the ANY_REAL value connected to the input is not a number (NaN). The function returns TRUE if the value is not a number. Otherwise FALSE is returned.
Parameters	Input IN Data type: ANY_REAL Description: Value to be checked. Output IS_NAN Data type: BOOL Description: Returns TRUE if the value is not a number (NaN), otherwise FALSE.
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. Further Info See the topic "General information on execution control with EN/ENO" for further details.