The 6270A pressure controller can be setup as an Autodetect device in COMPASS for Pressure v5 and higher. This is the preferred method to use a 6270A in COMPASS for Pressure. Here's a screen-shot of that (with the Autodetect button checked). Then just check the settings on the Communications tab.
Note that the highest ranged module should be in slot 1 of the 6270A controller (due to a bug in COMPASS for Pressure that will be fixed in version 5.0.50).
However, it is quite easy to setup as a non-Autodetect device. Instructions below are screen-shots from the setup in COMPASS for Pressure. See the below pdf file for detailed instructions.
Notes: Revised October 12, 2015 to remove Ready command from 6270A and use COMPASS to determine ready. Also added Test setup information.
Revised April 27,m 2018 to add the Ready command back in.
Contact Fluke Calibration Pressure Technical Support at the below link or call +1.877.355.3225 with any questions.