Counting when signal is not in a range
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I've builded this system
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?