Thanks Alex for the quick reply. I sort of understand your answer, but I don't know how to get the ladder page to allow me to put the data in that format. When I access the instruction list I can find FROM_M which then gives me a block on the ladder page with EN, n1, n2, n3 as inputs and ENO and d as outputs. From what I can find, the output (d) is where I put/store the analogue value, the inputs (EN) is an X value (but I don't know what), n1, n2, n3 ? All I need to do is gather the 4 values, with no averaging as the input is very stable. Hope that makes some sense, Richard