Counting when signal is not in a range

I've builded this system

http://img143.imageshack.us/img143/901/sysa.jpg

I want to check when signal is in the setted range of values al least for 1 second and if is not in the range, but for few seconds (0.5 seconds), it has to consider it in the range the same. If not-in-range-count is above 0.5 seconds it has not to consider it. Instead in my configuration (figure) when output of lowest integrator is not resetted and it is rising below 0.5 it returns TRUE. How can I check that final not-in-range-count is shorter than 0.5 seconds?

[Kaustubha Govind]

This question seems like a detailed version of http://www.mathworks.com/matlabcentral/answers/9637-not-sensible-to-short-time-false

Please consider deleting the old question.

[Kaustubha Govind]

What is the sample time of your Compare to Constant blocks?

[Fangjun Jiang]

The question is also very close to a previous one asked by you. Read it and solution is right there.

http://www.mathworks.com/matlabcentral/answers/8189-convert-range-of-signal-values-to-constant-by-simulink