Deletion Of Recordings; Storage Mode; Pre-Trigger And Post-Trigger Data - ABB Relion SMU615 Technical Manual

1MRS758407 B
7.2.2.6
7.2.2.7
7.2.2.8
SMU615
Technical Manual
running counter, which has a range of 1...9999. A hexadecimal representation is used
for the IP number octets. The appropriate file extension is added to the end of the file
name.

Deletion of recordings

There are several ways to delete disturbance recordings. The recordings can be deleted
individually or all at once.
Individual disturbance recordings can be deleted with PCM600 or any appropriate
computer software, which can access the merging unit's C:\COMTRADE folder. The
disturbance recording is not removed from the merging unit's memory until both of the
corresponding COMTRADE files, .CFG and .DAT, are deleted. The user may have to
delete both of the files types separately, depending on the software used.
Deleting all disturbance recordings at once is done either with PCM600 or any
appropriate computer software, or from the WHMI via the Clear/Disturbance
records menu. Deleting all disturbance recordings at once also clears the pre-trigger
recording in progress.

Storage mode

The disturbance recorder can capture data in two modes: waveform and trend mode.
The user can set the storage mode individually for each trigger source with the Storage
mode parameter of the corresponding analog channel or binary channel, the Stor.
mode manual parameter for manual trigger and the Stor. mode periodic parameter for
periodic trigger.
In the waveform mode, the samples are captured according to the Storage rate and
Pre-trg length parameters.
In the trend mode, one value is recorded for each enabled analog channel, once per
fundamental cycle. The recorded values are RMS values, which are scaled to peak
level. The binary channels of the disturbance recorder are also recorded once per
fundamental cycle in the trend mode.
Only post-trigger data is captured in trend mode.
The trend mode enables recording times of 32 * Record length.

Pre-trigger and post-trigger data

The waveforms of the disturbance recorder analog channels and the states of the
disturbance recorder binary channels are constantly recorded into the history memory
of the recorder. The user can adjust the percentage of the data duration preceding the
triggering, that is, the so-called pre-trigger time, with the Pre-trg length parameter.
The duration of the data following the triggering, that is, the so-called post-trigger
Section 7
Measurement functions
205