Sorry, but am I writing Suaheli or any other language? I know my english is not the very best, but in this case I think there is no doubt about it.
You asked
In a LIN_REL I'll write LIN_REL {X 30} #TOOL but this point is relative to the actual position. I want to do the same thing but making a motion that is relative to "MyPrel_Point" is it possible?
I answered:
MyPrel_Point:{x 30,y 0, z 0, a 0, b 0, c 0}
What do You think does this mean?
of course this is relative to tool. If you want to have a position relative to base you write
and if you want to have a moving instruction relative to base you write
And by the way, there is one more possibility: Just try it out on a robot or in the simulation, instead of asking for every little detail.