Toshiba V200 Series User Manual page 108

You can allot "ss" (slot number) from "Project Information" docker window; "IO Allocation\Local" section as shown
below:
When you double click on the highlighted slot section; below shown window will appear:
Note: Here you have to allocate slots serially. If you try to allocate randomly; it will show as an expansion error.
Modules for PLC are sequential; the previous slot can not be empty.
Page 100
Double click on each
slot to assign model name