6.11.7
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
P631
6 Local Control (HMI)
6-28
P631/EN M/R-11-C // P631-310-650
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