In my experience, those points can not be unbundled and are therefore not commandable. The way Insight does it is to change the initial value (write to flash memory) which is different from commanding.
However, I suspect there is a way to edit the setpoints using the other points that can be unbundled and I further suspect it involves the setpt dial. I don't really know Sys600/Apogee, maybe one of the experts here can shed some light?
What is the TEC application - 2023?