help on pic micro

You asked a specific monitoring question, but there is a general programming technique that solves all such problems for your design at once.

You set up a single monitoring timer, as loose as you are able to live with, and as close and detailed in the logging of the cause of its triggering as you desire. Then you keep programming all your segments with that in mind, that from time to time your routine should reset the monitor, so that it won't trigger. When the program is tardy or stuck anywhere, you have all the data to track the problem, or program a very specific response and log for your benefit. Additionally, knowing that the monitor will hammer sloppy programming does wonder to crisp and modular programming (effect on the programmer's mind mainly).