There used to be more of a difference, but IA Link keeps adding more functionality and encroaching on CC Link's features. In short, if you want to use a computer to control individual buttons on the GT using CCs, use CC Link. Otherwise, use IA Link.Thank you. I can confirm turning on IA Link worked for the button to Engage/Bypass the block. It also worked to keep the active channel in sync via the Hold function.
Curious, what is the difference between IA Link and CC Link?