Ce pi interface with tac 20

I have a ce pi that I am trying to get work on a tac 20. The ce driver board says thy02-x. I know there is a parameter in the 188e board that I can change to make it communicate with this driver board. I just can't remember what it is. It's a new job, but it waited too long to install and is no longer under warranty with tk. Does anyone know the parameter to change. Thanks

Figured it out. O43 parameter had to be changed