That's not what the pitch bend feature is designed for. It's designed for use with applications like GigPerformer that can send an explicit pitch bend value for the page to turn to. The analog pitch bend on your keyboard is going to send a whole series of values, so it will sent a 1 when pushed to the extreme, but it will also send a 2 when you let it to go as it returns to center (along with other intermediate values).
Mike
Mike