Question

what is accumulation of DT signal

Answer 1

                     The Discrete-Time Integrator block can be used in place of the       Integrator block to create a purely discrete system.

  The Discrete-Time Integrator block allows you to

 Define initial conditions on the block dialog box or as input to the block.

Output the block state.

Define upper and lower limits on the integral.

Reset the state depending on an additional reset input.

                                                             -Hope This Helps-