| time | A time value in the Time_t format. | 
| Return: | IsValidTime returns a BOOLEAN value. | 
The IsValidTime function returns TRUE if the time is valid, by validating each of the individual components (hours, minutes, and seconds).
Example:
IMPORT STD; t1 := 225922; t2 := 275922; firstTest := STD.Date.IsValidTime(t1); //true secondTest := STD.Date.IsValidTime(t2);//false