Fault And Oscillographic Data; Fault Data; Oscillographic Data - ABB REL 301 Instruction Leaflet

2.4.17

Fault and Oscillographic Data

The following sections explain the mechanisms for data capture and retrieval. As mentioned in
Section 1.5, communication port access requires Remote Communications Program (RCP)
software.
2.4.17.1

Fault Data

REL301/302 systems capture the latest sixteen fault data records in non-volatile memory. That
is, all records are saved even if control power is removed from the system. The two most recent
fault data records can be accessed via the front panel MMI. All sixteen fault data records can
be accessed via the communication port(s). Complete details concerning communication port
usage is contained in Section 4.6. For a detailed listing of fault data information see Table 4-3.
When a fault occurs, the MMI mode is switched to "L-FLT" mode and is set to provide informa-
tion on the most recent fault (Latest Fault). By pressing either the R
the fault data, for "L-FLT" may be reviewed. Also, when the fault occurs, the LEDs related to
"L-FLT" (e.g. ZONE-1 and AG LEDs) flash. LEDs flash, until reset, at a once per second rate
indicating one fault record exists, and at a twice per second rate indicating more than one fault
record exists.
Pressing the S
access to the second most recent fault record (Previous Fault). By pressing the R
push-buttons, the fault data, for "P-FLT" may be reviewed.
Pressing the R
return the "METER" mode. Pressing the R
data.
Fault data capture is initiated by one of the following selections of "Flt Data" setting:
"Trip"
"Zone-2"
"Zone-2, Zone-3"
2.4.17.2

Oscillographic Data

REL301/302 systems capture the latest sixteen oscillographic data records in volatile memory.
That is, all records are lost if control power is removed from the system. Oscillographic data
records can only be accessed via the communications port(s).
Oscillographic data records consist of 8 cycles of 8 analog quantities and 24 digital quantities
taken at a frequency of eight samples/cycle. The 8 cycles of information is comprised of one
cycle of pre-trigger and 7-cycles of post-trigger data.
When the data is retrieved, using RCP, it can be displayed in it's ASCII tabular form and saved
as a file for display at a later time. The file can also be used for graphical display of the user's
design or by using the Oscillographic Capture and Recording (OSCAR) software.
Oscillographic data is initiated by one of the following selections in the "OSC Data":
"Trip"
push-button once, will change the MMI display mode to "P-FLT" and allow
ELECT
push-button will "reset" the LED target indicators and cause the display to
ESET
– data captured only if trip action occurs
– data captured if Zone-2 logic operates or any trip action occurs
– data captured if Zone-2 or Zone-3 logic operates or any trip action occurs
– data taken only if trip action occurs
AISE
push-button does not erase the stored target
ESET
I.L. 40-386.4
or L push-buttons,
OWER
or L
AISE OWER
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