What would be the best literature or material I could obtain that gave the best holistic approach to working with Fanuc Robots? I've been a Tech for two years, but don't have much expierence with the communication and interface options between machines and equipment(I/0, ethernet/tcp, internet).A step be step explanation on error codes and recovery steps would be nice as well. We use multiple dual cell and single cell 120i, R-30iB plus for welding operations, with I/0 interface to fixture and work cell. I've heard how hard it is to find material on Fanuc and have bookmarked all the great information made available on this forum. I just wanted to check if there was any literature recommendations that could serve me well.