8.2.2.7 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.
8.2.2.8 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 time, is the
difference between the recording length and the pre-trigger time. Changing the pre-trigger
time resets the history data and the current recording under collection.
8.2.2.9 Operation modes
Disturbance recorder has two operation modes: saturation and overwrite mode. The user
can change the operation mode of the disturbance recorder with the Operation mode
parameter.
Saturation mode
In saturation mode, the captured recordings cannot be overwritten with new recordings.
Capturing the data is stopped when the recording memory is full, that is, when the
maximum number of recordings is reached. In this case, the event is sent via the state
change (TRUE) of the Memory full parameter. When there is memory available again,
another event is generated via the state change (FALSE) of the Memory full parameter.
Section 8 1MAC059074-MB A
Measurement functions
942 615 series ANSI
Technical Manual
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