How to assign several hit values to counter?

Hi all, I am using a counter from DSP System Toolbox which should output a boolean at specific values. So my idea is to use the hit parameter of the counter and provide a vector of the hit values to this parameter like [5,10,15]. The actual hit values are calculated in a Matlab function, the output vector is stored in variable y. How do I assign y as the hit value vector? In other words: What to do to make y selectable in the Block Parameters dialog pictured above, where the current text says 'No actions available for specified value'?