Communication between Lincoln Welder & ABB Robot Controller through Device-Net

Dear Sir
We are working on a Lincoln Welding Machine with ABB Robot 1520-ID where communication protocol  is Device-Net, we have successfully established the communication but I am unable to get all the data in Robot Pendant.
For eg. - I cannot switch between different weld modes through Robot Pendant
It would be great if everyone can share their views on this.
Thanks & Regards