Resetting

All information memories – including the event memories and the monitoring signal memory – as well as the LED indicators can be reset manually. In addition, the LED indicators are automatically cleared and initialized at the onset of a new fault – provided that the appropriate operating mode has been selected – so that they always indicate the latest fault.

The LED indicators can also be reset manually by pressing the CLEAR key, which is always possible in the standard control mode. This action also triggers an LED indicator test and an LCD display test. The event memories are not affected by this action, so that inadvertent deletion of the records associated with the reset signal pattern is reliably prevented.

Because of the ring structure of the event memories, the data for eight consecutive events are updated automatically so that manual resetting should not be necessary, in principle.

Deleting the event memories completely (e.g. after a function test), can be accomplished by various resetting actions including the configuration of a group resetting for several memories. An overview of all resetting actions can be found in section “Resetting Actions” in Chapter “Operation”.

Resetting a single memory from the local control panel is described in the following with the example of a fault memory. In this example the global change-enabling function has already been activated.

Control Step / Description

Control Action

Display

Step 0

Select the reset setting. Line 3 of the display shows the number of faults since the last reset, 10 in this example.

Oper/CtrlTest/FT_RC
Reset recording
        10

Step 1

Press the ENTER key. The LED indicator labeled EDIT MODE will light up.

Oper/CtrlTest/FT_RC
Reset recording
        10
Don't execute

Step 2

Press the “Up” or “Down” keys to change the setting to Execute.

Oper/CtrlTest/FT_RC
Reset recording
        10
Execute

Step 3

Press the ENTER key. The LED indicator labeled EDIT MODE will be extinguished. The value in line 3 is reset to 0.

Oper/CtrlTest/FT_RC
Reset recording
        0

Step 4

To cancel the intended clearing of the fault recordings after leaving the standard control mode (the LED indicator labeled EDIT MODE is on), press the CLEAR key. The LED indicator will be extinguished, and the fault recordings remain stored unchanged in the protection unit’s memory. Any setting can be selected again for a value change by pressing the keys.

Oper/CtrlTest/FT_RC
Reset recording
        10