Fault Record Selection ('Select Fault' cell: 0105)
This cell can be used to select a fault record directly, using a value between 0 and 4 to select one of up to
five stored fault records. (0 is the most recent fault and 4 is the oldest). The column then contains the details
of the fault record selected.
Maintenance Record Selection ('Select Maint' cell: 01F0)
This cell can be used to select a maintenance record using a value between 0 and 4. This cell operates in a
similar way to the fault record selection.
If this column is used to extract event information, the number associated with a particular record changes
when a new event or fault occurs.
Event Types
The IED generates events under certain circumstances such as:
● Change of state of output contact
● Change of state of opto-input
● Protection element operation
● Alarm condition
● Setting change
● Password entered/timed-out
Event Record Format
The IED returns the following fields when the Send Event command is invoked:
● Cell reference
● Time stamp
● Cell text
● Cell value
The Menu Database contains tables of possible events, and shows how the contents of the above fields are
interpreted. Fault and Maintenance records return a Courier Type 3 event, which contains the above fields
plus two additional fields:
● Event extraction column
● Event number
These events contain additional information, which is extracted from the IED using the RECORDER
EXTRACTION column B4. Row 01 of the RECORDER EXTRACTION column contains a Select Record
setting that allows the fault or maintenance record to be selected. This setting should be set to the event
number value returned in the record. The extended data can be extracted from the IED by uploading the text
and data from the column.
6.7 DISTURBANCE RECORD EXTRACTION
The stored disturbance records are accessible through the Courier interface. The records are extracted
using the RECORDER EXTRACTION column (B4).
The Select Record cell can be used to select the record to be extracted. Record 0 is the oldest non-
extracted record. Older records which have been already been extracted are assigned positive values, while
younger records are assigned negative values. To help automatic extraction through the rear port, the IED
sets the Disturbance bit of the Status byte, whenever there are non-extracted disturbance records.
Once a record has been selected, using the above cell, the time and date of the record can be read from the
Trigger Time
cell (B402). The disturbance record can be extracted using the block transfer mechanism from
Chapter 7 - SCADA Communications MiCOM P747
202 P747-TM-EN-1
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