It has to be with a VFD, no way around it, because of security reasons I was told.
I don't uderstand the term "security" in this context, It's clearly nothing to do with anti hacking or such, nor is it ( as I'm used to) anything to do with fault tolerance (it keeps going even when lots of the hardware has failed).
Maybe you such have a very good long chat with the boss a fing out what he really means - it's clear to me that you don't understand......
Mark