ABB DNP 670 Series Communication Protocol Manual page 31

Relion 670 series

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1MRK 511 391-UUS A

670 series 2.2 ANSI

Communication protocol manual

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 the analog channels connected to the disturbance recorder, and for the last 10

analog channels, the calculated value at the trigger time is provided.

Vendor-specific implementation

Section 3

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