1

Module type

Indicates the type of module in the slot. Roll the mouse over to see the module’s custom name, if one has been assigned. See Adding or Changing the Name of a Module  for more information.

If a module displays Unknown Backmodule, this can have the following causes:

• Invalid back module used with module
• Missing back module
• Front module doesn't detect the back module properly
• Communication problems between controller and module (cannot Mount NFS of module)

2

Back module

Displays the back module that is in the slot; when surrounded by a red or yellow border, the module is in a fault state. If the space is filled with a black box, the slot is empty.

Click a module to jump to the configuration window for that slot.

3

Slot number

Indicates the slot number.

4

Failsafe indicator

Indicates that the module in the slot is in Failsafe mode. See Upgrading Firmware  for more information.

5

Protection indicator

Indicates the slot’s protection status, as follows:

• Green—The module is protected by another module, and is not in a failed state
• Green with a red X—The module is assigned protection by another module, but that protection is disabled
• Red—Module has failed over to another module
• Blue—The module is protecting another module
• Grey—Indicates that protection is configured for the module, but that the backup module is no longer valid or available
• No indicator—The slot is neither protecting another slot, nor protected

  Roll the mouse over the indicator to see the module that is assigned to protect this slot.

6

Empty slot

Indicates that the slot is currently unoccupied, or that the module in the slot is currently covering the functionality of a failed module in another slot.