RSLogix 5000 & Autotune

[phuz 2]

It completes "successfully" according to its status, but has several warnings, including PV too small, etc. I am trying to run this on a temperature loop that takes about 20 seconds to respond to a CV output, even if the CV is 100%. The autotune finishes and gives results, but they are obviously inaccurate. I am doing an average of 100 samples on the temperatures coming in from the RTDs, so there is no "noise" that could be throwing off the autotune. Is there a way to get this thing to run properly, because it is never seeing the second steady state value associated with the CV change. Thanks.