# History

## Navigation

Right-click the device and then select Configure > Redundant Framework > History.

The following information is displayed:

> Switchover Details:

- Maximum Length of History Table (cRFHistoryTableMaxLength)

- Availability of Redundant unit in seconds (cRFHistoryStandByAvailTime)

> History Table:

- Index (cRFHistorySwitchOverIndex)

- Previous Active Unit Slot Number (cRFHistoryPrevActiveUnitId)

- Current Active Unit Slot Number (cRFHistoryCurrActiveUnitId)

- Switch Over Reason (cRFHistorySwitchOverReason)

- Swact Time (cRFHistorySwactTime)

### Switchover Details:

### Maximum Length of History Table (cRFHistoryTableMaxLength)

Maximum number of entries allowed in the history table. The value of this object is zero if no history is being maintained.

### Availability of Redundant unit in seconds (cRFHistoryStandByAvailTime)

Indicates the cumulative time that a standby redundant unit has been available since the last system initialization.

### History Table:

### Index (cRFHistorySwitchOverIndex)

A monotonically increasing integer used to index the history table. After reaching the maximum value, the value of this object resets to 1.

### Previous Active Unit Slot Number (cRFHistoryPrevActiveUnitId)

Indicates the primary redundant unit that went down.

### Current Active Unit Slot Number (cRFHistoryCurrActiveUnitId)

Indicates the secondary redundant unit that took over as active.

### Switch Over Reason (cRFHistorySwitchOverReason)

Indicates the reason for the last switchover.

### Swact Time (cRFHistorySwactTime)

Indicates when the last switchover occurred.