So I have got the second controller connect, and the servo motor I am using starts up just like the main ones on the SFX100, but I cannot get any movement out if during a simulation. I am NOT using the same servo and controller as the SFX100, but a NEMA 32 and servo controller (open loop) - perhaps this is the issue ? but I would have thought that the simfeed back software is pushing out PWM signal so either should work as there appears to be no feedback loop to simfeedback judging by the wiring (only pulse/step , direction and enable).
The fact that the NEMA servo goes to the mid position using controller 2 when starting up had me hopeful - but now I am not sure .....