Settings Transfer; Event Extraction; Automatic Event Record Extraction; Manual Event Record Extraction - GE MiCOM P747 Agile Technical Manual

MiCOM P747
Method 1
This uses a combination of three commands to perform a settings change:
First, enter Setting mode: This checks that the cell is settable and returns the limits.
1. Preload Setting: This places a new value into the cell. This value is echoed to ensure that setting
corruption has not taken place. The validity of the setting is not checked by this action.
2. Execute Setting: This confirms the setting change. If the change is valid, a positive response is
returned. If the setting change fails, an error response is returned.
3. Abort Setting: This command can be used to abandon the setting change.
This is the most secure method. It is ideally suited to on-line editors because the setting limits are extracted
before the setting change is made. However, this method can be slow if many settings are being changed
because three commands are required for each change.
Method 2
The Set Value command can be used to change a setting directly. The response to this command is either a
positive confirm or an error code to indicate the nature of a failure. This command can be used to implement
a setting more rapidly than the previous method, however the limits are not extracted. This method is
therefore most suitable for off-line setting editors such as MiCOM S1 Agile, or for issuing preconfigured
control commands.
6.5

SETTINGS TRANSFER

To transfer the settings to or from the IED, use the settings application software.
6.6

EVENT EXTRACTION

You can extract events either automatically (rear serial port only) or manually (either serial port). For
automatic extraction, all events are extracted in sequential order using the standard Courier event
mechanism. This includes fault and maintenance data if appropriate. The manual approach allows you to
select events, faults, or maintenance data as desired.
6.6.1

AUTOMATIC EVENT RECORD EXTRACTION

This method is intended for continuous extraction of event and fault information as it is produced. It is only
supported through the rear Courier port.
When new event information is created, the Event bit is set in the Status byte. This indicates to the Master
device that event information is available. The oldest, non-extracted event can be extracted from the IED
using the Send Event command. The IED responds with the event data.
Once an event has been extracted, the Accept Event command can be used to confirm that the event has
been successfully extracted. When all events have been extracted, the Event bit is reset. If there are more
events still to be extracted, the next event can be accessed using the Send Event command as before.
6.6.2

MANUAL EVENT RECORD EXTRACTION

The VIEW RECORDS column (location 01) is used for manual viewing of event, fault, and maintenance
records. The contents of this column depend on the nature of the record selected. You can select events by
event number and directly select a fault or maintenance record by number.
Event Record Selection ('Select Event' cell: 0101)
This cell can be set the number of stored events. For simple event records (Type 0), cells 0102 to 0105
contain the event details. A single cell is used to represent each of the event fields. If the event selected is a
fault or maintenance record (Type 3), the remainder of the column contains the additional information.
P747-TM-EN-1
P747-TM-EN-1.1
Chapter 7 - SCADA Communications
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