The disturbance recorder has two operation modes: saturation and overwrite mode. The operation mode of the disturbance recorder can be changed 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 Memory full signal state is changed to TRUE. When there is memory available again, the Memory full signal state is changed to FALSE.
Overwrite mode
In the overwrite mode, if the recording memory is full, the oldest recording is overwritten with the pre-trigger data collected for the next recording. Each time a recording is overwritten, the Overwrite of rec. signal state is changed to TRUE.
The overwrite mode is recommended if it is important to have the latest recordings in the memory. The saturation mode is preferred when the oldest recordings are more important.
New triggerings are blocked in both modes until the previous recording is completed, but a new triggering can be accepted before all pre-trigger samples are collected for the new recording. In such a case, the recording is as much shorter as there are pre-trigger samples lacking.