Array input to Add on instruction

Hello,

I have just started programming RS Logix 5000 for Compact logix. Seems quite neat.

I have made my own "Add on instruction" without problem. However I want a two dimensional array as an input to the "Add on instruction" but it does not seem possible. How to get an array in to my "Add on instruction" ?

The parameter for passing the array has to be designated as In/Out. It has to be passed by reference.