Can someone please explain what the following modes are on a KONE controller?

* FRD
* PRC
* OSS
* EAQ
* ATS

These are mentioned in the KONE E-Link Installation Instruction, on page 72 (133) under Table 4: List of elevator mode signals, and in other places, but always as the 3-character acronym, and never with an actual description.

I am trying to interface a non-proprietary controller to E-Link, but not getting a lot of help from KONE about what these mean, so any help appreciated!