real time signal window buffering for processing in SIMULINK MATLAB

I am writing a code for wavelet transform and neural network in real time simulink. streaming AC signal is captured through DAQ card. Fault may arise in one cycle of the streaming incoming signal that will be detected by the algorithm. Algorithm can process 10 cycles while cycles are always incoming. How to buffer incoming cycles for processing . Because processing takes some time for computation. If the incoming signals are not buffered then faulty cycle might not be detected by the algorithm........Please help