Basler BE1-CDS220, Инструкция по эксплуатации

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6-36 Reporting and Alarm Functions BE1-CDS220
Oscillographic Records
Recording Oscillographic Records
The fault reporting function can record 240 cycles of sample data at 24 samples per cycle for current
inputs I
A
, I
B
,
I
C
,
and I
G
(optional independent ground input). 480 cycles are possible with the expanded
memory option, Load Profile option Y, 4,000 point data array. Each oscillographic record length is
determined by the number of partitions programmed. Table 6-18 lists the possible numbers of
oscillographic records for each partition. For more information on programming partitions (record lengths),
see Oscillographic Records Settings, later in this section. The records are formatted to IEEE Standard
C37.111, Common Format for Transient Data Exchange (COMTRADE).
Table 6-18. Possible Oscillographic Records
Number of Records Length in Cycles
6 80
8 60
10 48
15 32
20 24
24 20
32 15
Each time the fault reporting function starts recording a fault summary report, it freezes a three cycle pre-
fault buffer and records for the length of the record. If the pickup and logic trigger expressions have not
returned to false within that time, the oscillographic recording function records a second record to capture
the end of the fault. The second record records one-forth cycle to five cycles of pre-trigger depending on
when the second record begins. If the second record begins within five cycles of the end of the first
record, then there is no gap in data between the two records. If the second record begins after five cycles,
there will be a gap (some data not recorded) between the records. Refer to Figure 6-9, Legend E. In that
illustration, the number of records was set to 32, which equates to 15 cycles recorded. The first record is
triggered and has 3 cycles of pre-trigger data and 12 cycles of post-trigger data. The fault takes longer
than 12 cycles to clear so a second record is necessary. The pickup condition drops out approximately
3.5 cycles into the second record, which is the trigger point for the second record. In this case, the second
record will consist of 3.5 cycles of pre-trigger and 11.5 cycles of post-trigger data.
The oscillographic records are stored in nonvolatile memory. As additional faults are recorded, the oldest
oscillographic records are overwritten.
Oscillographic Records Settings
The oscillographic records settings can be programmed
through BESTCOMS. To select the number of records, select
Reporting and Alarms from the Screens pull-down menu.
Select the Fault Recording tab and click the Select box in the
Oscillographic Records pane. Make your selection as shown in
Figure 6-21, Oscillographic Records Selector. Select Done
once the setting has been made.
The oscillographic records settings can also be made using
the SG-OSC (settings general, oscillography) ASCII command.
See Table 6-19 for possible settings.
Table 6-19. Oscillographic Records Settings
Range 6, 8, 10, 12, 15, 16, 20, 24, 32
Default 16
Figure 6-21. Oscillographic Records Selector