The 527F requires the rigid tapping software to be installed, see OPTIONS command to display status.
Next the machine must support rigid tapping see this post to help determine if machine supports rigid tapping:
Basically the setup is 99% the same as the Fadal, the RAMP and GAIN numbers will be typically be a bit different compared to what the CNC88 would end with. Use the instructions attached. You auto tune the drive. Using the Fadal service tool thread you adjust the GAIN and RAMP for the Rigid tapping in SETP:

Rigid tapping calibration, See attached procedure, and video:
https://drive.google.com/open?id=1Frf5tQnAhnlMEB09GebM3MFLhziJb4R9
"Gain is too" low video:
https://drive.google.com/file/d/1uVEnTssDEUBuGOeUoRTG8jDcsoKIag6-/view?usp=drive_link
"Gain is just right" video:
https://drive.google.com/file/d/1WpJMKpPai9EpYQgWmX3RvITrRkIX9F04/view?usp=drive_link