Override Unit Delay block outptut

[shouvik.d]

Product: Matlab, Simulink
Problem Statement: Complex feedback loops implying usage of Unit Delay Block. At certain simulation frame calculation of required values for test generation is becoming complex. Is there a way to override the Unit Delay block output without changing the model (as I am not allowed to do so) rather by using set_param. I am using cvdata/sim/cvhtml combination for my simulation. I tried extracting all the assocaited aparameter sfor Unit Delay using

get_param(gcb,'ObjectParameters');

but was not able to find a suitable parameter to use owing to lack of help information on each parameters.

Kindly help me out if this approach is possible.