This is a read only value and indicates state of the Protection or Protected Module. A value of zero indicates the module plugged into this slot is not being protected or is not protecting another module. A non-zero value indicates the module plugged into this slot is being protected or is protecting another module. A non-zero value contains the protecting module slot number and the protected module slot number encoded with in it. Least significant 16 bits indicate the protected module slot and most significant 16 bits indicate the protecting module slot.