How to prevent imported discrete signal from stepping automatically.

Hello, I am trying to codegen a Simulink model that uses imported data as an input. The inputs are in the form of arrays of values, and inside the model I use a selector to manually change between elements in these arrays.

To get this to work, I had to use a structure with no time data (as in http://www.mathworks.co.uk/help/simulink/ug/importing-data-to-test-a-discrete-algorithm.html ). But now, the Input blocks automatically select elements of the array one-by-one, changing sequentially in each simulation step.

Is there a way of using array data as an input (without specifying time), whilst being able to select elements manually, rather than changing automatically for each simulation step?

Thanks!

[David]

To clarify: I want the simulation to run a number of simulation steps for a given element from the arrays, until a logic check triggers a request for selecting the next element.