Change $robruntime

trying to sell robot?

it's not ethic.

its well hidden but there is no need to change it unless you are clocking the robot lol

Is it not a write protected variable?

nope

if you have changed RDC then message will show up that machine data does not match and you are given option to copy data from HDD to RDC (or from RDC to HDD).

you can contact local KUKA.

You don't need to change it as its not in warranty
I know how to do it but I don't think it should. Be in the open as some people could use it for financial gain

Sorry