Puzzling result during new installation. New ESS with the MB3 b.o.b.  I am just finding my feet with configuring but feel confident that I defined the pins correctly. As i checked RPM of spindle with a hand held device, i could only get FWD rotation by hitting CCW button in the GUI. I also tested  simple gcode files and had to change  M03 to M04 to get any action.

It is a simple 2.2kW VFD that wants FWD and ANA 0-10V.

Your assistance is much appreciated

This topic is now solved. Some small adjustments in Mach4 control/spindle. Now back to work!