Also I don't seem to be able divide two floats in a compute instruction, any ideas??
You must have had a mistake. I tried indirect addressing using a MOV and it seems to work fine to move a value into any counter ACCUMULATOR. Also indirect addressing can be used with Unlatch (U) to reset the Counter DN bit. See picture.I tried to use indirect addressing but got an error saying indirect addressing not allowed when veriying the rung.