Rockwell Automation 9323-S5500D A.I. SERIES MICROLOGIX 1000 AND PLC-500 SOFTW - Manual (Page 61)

Configuring the SLC 500 CPU and I/O Modules
3-5
3. Select [F1] Rack #1 , [F2] Rack #2 , or [F3] Rack #3 . A list of rack types will
appear.
4. Use the arrow keys to highlight the rack type and press [Enter] , or just press the
associated function key.
Asterisks (*) will appear next to the slot numbers the rack contains.
To remove a rack from the configuration, follow the steps above, but in step 4 select
[F5] Not Installed .