Can I set up mapping to create a counter in my unit?

Yes, you can create a counter in mapping of the HI 3000 or HI 4000 series units..  This is an excersize in  logic, but to make it easier, we have created one to give you an idea of how to do this and attached it to this answer.  This attached file gives you a counter and a totalizer in it.

The logic involved is the same regardless of which of the HI 3000 or HI 4000 units you are using.