Class Assignment; Fault Record - Hitachi Relion 670 Series Communication Protocol Manual

1MRK511391-UUS Rev. L
Point gaps may be inserted if wanted. However, too many and too big gaps are not recommended. Point
gaps cannot be read by the client.
3.8.2

Class assignment

Class assignment allows the events generated in the IED to be reported as DNP3 events. Some
configurations exceed the class assignment possibilities defined by the standard.
Table 3:
Configuration
None
Class 0
Class 0 and any class 1,2,3
combination
Class 1, 2 or 3 combination
Binary outputs status (BOS) points exist only if the corresponding control relay output block (CROB) point
has been inserted in the active point list.
3.9

Fault record

Fault record is a mechanism to browse through disturbance records. It shows a snapshot of important
information from each existing disturbance record.
Fault record contains signals that provide information on the current disturbance that the user of the
FaultRecord has selected. It provides signals that help the user to iterate and browse through the existing
disturbances. All the signals that can be used to iterate the fault records can be mapped as binary
outputs in PCM600 and operated on with CROBs. All signals that provide information on the current
disturbance can be mapped as analog inputs and read by the master. The DNP3 master navigates
through the FaultRecord using the three signals:
• GetFirstRec fetches the oldest record in the FaultRecord.
• GetNextRec fetches the next record in time in the FaultRecord relative to the previously fetched
record. If the previously fetched record is the newest, no fetch is done.
• GetPrevRec fetches the previous record in time in the FaultRecord relative to the previously fetched
record. If the previously fetched record is the oldest, no fetch is done.
When a new disturbance is recorded, and the outputs are mapped to one of the event classes, events
are generated, but the navigation in the FaultRecord is not affected. Hence, when the next command is
sent from the DNP3 master, the fetched position is relative to the last fetch done; the position in the
FaultRecord before the new disturbance occurred.
The output signals provide the fault record number, which is the number of the disturbance in the LHMI or
PCM600, the number of faults in the IED, the active setting group at the time of the disturbance
recording, the trigger signal identity, the time stamp at the trigger time as well as the fault location and the
fault type. In addition, the magnitude, angle, fault magnitude and fault angle are provided for up to 30 of
DNP, 670 series
Communication protocol manual
DNP3 point map configuration
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Description
Integrity class 0 scan returns gap.
Value is available only via static scan.
Point does not generate events.
Point is returned in the class 0 scan.
Point does not generate events.
Point is returned in the class 0 scan.
Point generates events for the selected class or classes.
Point is not returned in the class 0 scan.
Point generates events for the selected class or classes.
Section 3
Vendor-specific implementation
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GUID-F226B59F-BB08-4AB3-8026-D3D7BAD863AA v3
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