6-26
Reporting and Alarm Functions
BE1-951
important because it is required to retrieve information about that event from the relay. This directory report
can be accessed by using the RF command.
RF Command
Purpose:
Read or reset fault report data.
Syntax:
RF-<n/NEW>[=<0/TRIG>]
Comments: n = fault record number (1 to 255)
NEW = newest fault record since all records were last reset using RG=0
Fault Summary Report Example
1.
>RF
BE1-951 FAULT DIRECTORY
REPORT DATE : 01/01/99
REPORT TIME : 01:12:25
STATION ID : SUBSTATION_1
RELAY ID : BE1-951
RELAY ADDRESS : 0
NEW FAULTS : 3 (11:22:21 05/27/99-00:00:47 01/01/99)
TOTAL FAULTS : 3 (11:22:21 05/27/99-00:00:47 01/01/99)
-#- --DATE-- --TIME-- --EVENT TYPE-- --OSC--
197 01/01/99 00:00:47 TRIP 2
196 05/27/99 11:22:30 TRIP 0
195 05/27/99 11:22:21 TRIP 0
New Faults Counter. One line of the fault summary directory report contains the new faults counter. The new
faults counter tracks how many new fault reports have been recorded since the new faults counter was reset
to 0. This counter provides a way to check the fault information and then reset the new faults counter. Then,
the next time that the relay is checked, it’s easy to determine if any fault reports have been entered.
Resetting the new faults counter is achieved using the RF-NEW=0 command. Write access to Reports must
be gained to reset the new faults counter through the communication ports. The new faults counter can also
be viewed at HMI screen 4.1. The new faults counter cannot be reset at the HMI.
Fault Summary Reports. Individual fault summary reports can be retrieved using the RF-n command, where
n represents the number assigned to the fault summary report. To obtain the most recent report, use
RF-NEW. If additional detail is desired, Sequence of Events Recorder data and Oscillographic data can be
obtained for the faults also. This is discussed in greater detail later in this section.
Oscillographic Records
Recording Oscillographic Records
The fault reporting function can record up to 16 IEEE Standard Common Format for Transient Data
Exchange (COMTRADE) oscillographic records. Each time the fault reporting function starts recording a
fault summary report, it freezes a 4 cycle pre-fault buffer. If the fault isn’t cleared within that time, the fault
reporting function records a second oscillographic record. This second record captures the end of the fault.
Oscillographic records are stored in volatile memory. As additional faults are recorded, the oldest records
are overwritten. The relay has 240 cycles of memory. The SG-OSC setting sets the number of partitions
and the length of the record is a function of the number of records. See Table 6-14.
If a second oscillographic record is required, the fault recording function will continue to record sample data
in the second record with no gap. During this time, a 5 cycle buffer is being filled. If the fault is cleared within
5 cycles of the start of the second record, the record is terminated after it finished. If the fault doesn’t clear
in that period of time, the fault reporting function continues to save 5 cycles of sample data in its buffer until
the fault is cleared. At that point, it freezes the 5 cycle buffer, providing 5 cycles of end of fault data.
