I have some hard time to configure my switchs using the FDS-SYS4X, maybe someone can guide me with the format I have to use. In this example, I'm trying to map the Lower DU switch for the PMDG 737NGX. I have no issue with LEDS, only switchs. I think I don't really understand the world of the offsets
Here is some screen-shot :

Thanks for the help !