Got no response here, or from the manufacturer, so I just hooked it up and started working it out.
Don't have all the connections mapped, but this is what I know (and it's enough for me)
Connector 20+21 net mains (230V, 50Hz)
22,23,24 3 phase power to the motor (also 230V, variable frequency)
25 ground
10 and 16, connect together to start motor (this is a low voltage control circuit to turn on and off)
to program the frequency controller:
A1 - A8 settings for the motor and the mains voltage/frequency
A1 - mains frequency (50 to 60Hz)
A9 - normal operating frequency for the motor (this is where you can under or over drive your motor to run slower or faster)
B1 - startup time once connection 10+16 are connected, this is how long the ramp up to A9 frequency takes.
B2 - unused for my situation, time to reduced speed if runtime is other then continues (settings in the C series)
B3 - reduced speed for end of run, in Hz
B6 - slow damp ramp time when 10+16 are disconnected (or runtime is over)
B7 - ?
B9 - unused by me. Slow speed time (at end of run how long to run at speed set by B3)
C2 - ?
C3 and C4 some kind of combination between these two to set runtime at normal operating frequency, set both to 0 to get unlimited runtime.
Bn - ?
If C3 and C4 are set to a specific runtime, setting B3 (speed in Hz) and B9 (time) will set a secondary time and speed for the motor to run once the main run duration (C3/C4 at speed set in A9) is over. This is normally used to make a door open/close fast and slow down at the end.
Hope this helps someone in the future.