I have not been able to get the synchronization to turn on. Also cannot turn on one lever operation mode.
When I tried the procedure from the manual, a steady beep started and did not quit until I shifted into neutral and pressed the transfer button.
Much later I noticed errors on both trans controllers. Both had to do with no assignment of a master/slave.
Could this be a transmission setup issue, say function A0 not properly set?
Or is it as simple as not starting the master engine first?

The transmission controller, set ups look pretty straight forward but, I do not see a setting for master/slave. I might assume that A0 (processor identification) would indicate that, but there is nothing in the manual that explicitly states it.