I try to used diagram editor for ABB 800xA FP4 , I had create one diagram and want to create two differnent sheet and used function block but it is not possible.
only the first sheet support function block , second sheet and etc support only stucture text and SFC , that is normal or I have to activate parameter to enable the function block for all sheets.
You can add tab and right click and select language options available for ur requirements.
Diagram editor you can launch by right click on application and diagram editir.
It's a common platform for fbd,control modules and custom lib blocks this is d main advantage of using this