You can try to modify the pulse interval & pulse length like this. (3,2),(7,5),(10,5),(12,6)...
If pulse interval is less than or equal to two times of pulse length, will always out put true.

There's no reason that this can't work. #344 will make it work.

Actually, this is not a bug.

Pulse length can at most be half of the pulse interval, because both a true and false pulse of that length must fit in the interval.

This will be clarified in the next update.

Please inform me here when you had updated the document(language file).

What document? The language file? That has been updated in the commit mentioned above.
Will be included in next update.