Hi,
you should fire a global event and pass in that event your value, then any fsm willing to be noticed about this value change simply needs to implement an fsm using theta global event as a global transition.
I do that all the time, it's very powerful. NOW, if the value if changing everyframe, not a good idea... instead, prefer implement a registration system so that all interested FSM can access the value directly at the source using "Get Fsm xxx".
bye,
Jean