Help needed to connect my VFD to the AXBB controller

[Doddy]

The digital inputs to the VFD are referenced to the digital ground, DCM. The isolated outputs that you're using on the AXBB are open-collector outputs to the AXBB's 24V0 supply. So, rather than connect DCM to 5V0 connect it to 24V0. It's possible, of course, that your 5V0 and 24V0 are commoned in any case depending on your PSU wiring.

Question for you - when you enter a M3/M4 command from the MDI on the RUN page, do the corresponding LEDs on P1[2:3] illuminate?, just a check that you're getting the digital drive for the motor selection. Secondly - according to your settings a "M3 S5000" command into the MDI should set the AO1 pin to 10V, and e.g. "M3 S2500" should set to 5V. Does it?