Only 1 controller at a time will ever be active, but the standby controller will still post on power-up and show some info via the serial cable.

Yes I know that when you serial into the passive controller it has limited functionality and you are required to serial into the active. It doesn't even prompt when serialled in so a support call for me I think :-(

Thanks

I haven't no, but I can serial to and setup/initialise the array. I can get onto the GUI and that's where it says in the members controller section under Control Module Slot 0 'Contol Module is not installed' in red letters.