What i found was that I completed the 40000 mapping of Data Tags in the Communications protocol of the DA70A to match all of those entered in the CR3000 Data Tags, and the erratic display at the CR3000 has been eliminated.
I did not think the Communications protocol omission at the controller would interfere with the HMI, but I no longer can duplicate the error seen (failed button actions, numeric displays flashing blank) with the 40000 registers unassigned. Would this mapping correction really fix a problem?