This dialog opens when you effect I/O assignment for a panel that has both fieldbus and conventional terminal strips.
You open this dialog from Domain Explorer. right-click a panel that contains both fieldbus and conventional terminal strips, and on the pop-up menu, select I/O Assignment.
I/O assignment type
Allows you to select one of the two options.
I/O assignment
Opens the I/O Assignment window for the conventional terminal strips in the panel.
Segment I/O assignment
Opens the Segment I/O Assignment window for the fieldbus strips in the panel.