Yamaha O2R Owner's Manual page 289

MIDI 179
When the 02R or ProR3/REV500 is first connected, or turned on, use the
CONNECT function to update the 02R controls so that they match those of
the ProR3/REV500. When the CONNECT function is used, the settings
from the ProR3/REV500 are copied to the 02R.
02R User's Guide