the Storage mode parameter of the corresponding analog channel or binarychannel, the Stor. mode manual parameter for manual trigger and the Stor. modeperiodic parameter for periodic trigger.In the waveform mode, the samples are captured according to the Storage rate andPre-trg length parameters.In the trend mode, one value is recorded for each enabled analog channel, once perfundamental cycle. The recorded values are RMS values, which are scaled to peaklevel. The binary channels of the disturbance recorder are also recorded once perfundamental cycle in the trend mode.Only post-trigger data is captured in trend mode.The trend mode enables recording times of 32 * Record length.8.2.1.8 Pre-trigger and post-trigger dataThe waveforms of the disturbance recorder analog channels and the states of thedisturbance recorder binary channels are constantly recorded into the historymemory of the recorder. The user can adjust the percentage of the data durationpreceding the triggering, that is, the so-called pre-trigger time, with the Pre-trglength 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 currentrecording under collection.8.2.1.9 Operation modesDisturbance recorder has two operation modes: saturation and overwrite mode. Theuser can change the operation mode of the disturbance recorder with the Operationmode parameter.Saturation modeIn saturation mode, the captured recordings cannot be overwritten with newrecordings. Capturing the data is stopped when the recording memory is full, thatis, when the maximum number of recordings is reached. In this case, the event issent via the state change (TRUE) of the Memory full parameter. When there ismemory available again, another event is generated via the state change (FALSE)of the Memory full parameter.Overwrite modeWhen the operation mode is "Overwrite" and the recording memory is full, theoldest recording is overwritten with the pre-trigger data collected for the nextrecording. Each time a recording is overwritten, the event is generated via the statechange of the Overwrite of rec. parameter. The overwrite mode is recommended, ifSection 8 1YHT530004D05 DMeasurement functions654 615 seriesTechnical Manual
