OCP displays for I/O drawers and system drawers are set in the same manner.
To perform this task, you must first take exclusive control of AMU. After you have exclusive control, right-click on either the I/O Drawer icon or the System Drawer icon in the left frame of the main display to access the I/O drawer context popup menu or the system drawer context popup menu.
Choose Set OCP Display. The Set OCP Display dialog box appears.

Enter the text of the OCP message and click OK.
A message in the bottom frame of the main display confirms your action.
Be sure to return exclusive control when you finish setting the OCP display.