Reading Transient Recorder; Reading Fault Reports - GE Multilin 850 Communications Manual

READING TRANSIENT RECORDER

Reading Transient Recorder

Reading Fault Reports

10-2
Familiarity with the Transient recorder feature is required to understand the following
description.
The Oscillography_ Number_of_Triggers register is incremented by one every time a new
oscillography file is triggered (captured) and cleared to zero when oscillography data is
cleared. When a new trigger occurs, the associated oscillography file is assigned a file
identifier number equal to the incremented value of the register; the newest file number is
equal to the Oscillography_Number_of_Triggers register. This register can be used to
determine if any new data has been captured by periodically reading it to see if the value
has changed; if the number has increased then new data is available.
The Oscillography Number of Records register specifies the maximum number of files (and
the number of cycles of data per file) that can be stored in the memory of the relay.
The Oscillography Available Records register specifies the actual number of files that are
stored and still available to be read out of the relay. Writing "Yes" (i.e. the value 1) to the
Oscillography Clear Data register clears oscillography data files, clears both the
Oscillography Number of Triggers and Oscillography Available Records registers to zero,
and sets the Oscillography Last Cleared Date to the present date and time.
To read binary COMTRADE oscillography files, read the following filenames:
OSCnnnn.CFG and OSCnnn.DAT
Transient Record retrieval example:
tftp -i 172.16.0.2 get osc1.cfg
tftp -i 172.16.0.2 get osc1.dat
Fault report data is available via the file retrieval mechanism in each8 Series relay. The
filename is FaultReport1_#####.txt and the ##### refers to the fault report record
number.
The fault report number is a counter that indicates how many fault reports have ever
occurred. Only the last fifteen fault reports are available for retrieval; a request for a non-
existent fault report file yields a null file.
The total amount of available reports since the last clear command is found in "Number of
Reports", Modbus register (32690).
Report retrieval example:
tftp -i 172.16.0.2 get FaultReport1_1.txt
CHAPTER 10: FILE TRANSFER PROTOCOLS
8 SERIES PROTECTIVE RELAY PLATFORM – COMMUNICATIONS GUIDE