Multiple cameras

I have a question about the use of multiple cameras. What happens if the script calls for both cameras to fire simultaneously, e.g. they both are programmed to take an exposure at C1+10 sec (either by a standalone TAKEPIC command or one in a loop)?
Does the signal get sent to both, simultaneously (via the seperate USB) ports? Does one command override the other?
Or do I need to adjust the commands to avoid this condition?
And, yes, I know it's very late to start messing with scripts.
Charlie
Does the signal get sent to both, simultaneously (via the seperate USB) ports? Does one command override the other?
Or do I need to adjust the commands to avoid this condition?
And, yes, I know it's very late to start messing with scripts.

Charlie